The danger of not understanding the true spiritual meanings of prophecies

As the adherents of Jesus have never understood the hidden meaning of these words, and as the signs which they and the leaders of their Faith have expected have failed to appear, they therefore refused to acknowledge, even until now, the truth of those Manifestations of Holiness that have since the days of Jesus been made manifest. They have thus deprived themselves of the outpourings of God’s holy grace, and of the wonders of His divine utterance. Such is their low estate in this, the Day of Resurrection! They have even failed to perceive that were the signs of the Manifestation of God in every age to appear in the visible realm in accordance with the text of established traditions, none could possibly deny or turn away, nor would the blessed be distinguished from the miserable, and the transgressor from the God-fearing. Judge fairly: Were the prophecies recorded in the Gospel to be literally fulfilled; were Jesus, Son of Mary, accompanied by angels, to descend from the visible heaven upon the clouds; who would dare to disbelieve, who would dare to reject the truth, and wax disdainful? Nay, such consternation would immediately seize all the dwellers of the earth that no soul would feel able to utter a word, much less to reject or accept the truth.
- Baha’u’llah  ('The Book of Certitude')

Difficulties experienced by each Manifestation of God

Judge thou fairly, I adjure thee by God. What proof did the Jewish doctors adduce wherewith to condemn Him Who was the Spirit of God (Jesus Christ), when He came unto them with truth? What could have been the evidence produced by the Pharisees and the idolatrous priests to justify their denial of Muhammad, the Apostle of God when He came unto them with a Book that judged between truth and falsehood with a justice which turned into light the darkness of the earth, and enraptured the hearts of such as had known Him? 
- Baha'u'llah  ('Epistle to the Son of the Wolf')

Consider and call thou to mind the days whereon the Spirit of God (Jesus Christ) appeared, and Herod gave judgment against Him. God, however, aided Him with the hosts of the unseen, and protected Him with truth, and sent Him down unto another land, according to His promise. He, verily, ordaineth what He pleaseth. Thy Lord truly preserveth whom He willeth, be he in the midst of the seas or in the maw of the serpent, or beneath the sword of the oppressor." 
- Baha'u'llah  (Epistle to the Son of the Wolf')

He that married not (Jesus Christ) could find no place wherein to abide, nor where to lay His head, by reason of what the hands of the treacherous had wrought. His holiness consisted not in the things ye have believed and imagined, but rather in the things which belong unto Us. Ask, that ye may be made aware of His station which hath been exalted above the vain imaginings of all the peoples of the earth. Blessed are they that understand. 
- Baha'u'llah  ('Epistle to the Son of the Wolf')

God will continue sending Prophets till ‘the end that hath no end’

God hath sent down His Messengers to succeed to Moses and Jesus, and He will continue to do so till ‘the end that hath no end’; so that His grace may, from the heaven of Divine bounty, be continually vouchsafed to mankind. 
- Baha’u’llah  (Quoted by Shoghi Effendi in 'The World Order of Baha’u’llah')

The Essence and Reality of God is beyond the comprehension of human beings and His Manifestations (Prophets, Messengers)

In every age and cycle He hath, through the splendorous light shed by the Manifestations of His wondrous Essence, recreated all things, so that whatsoever reflecteth in the heavens and on the earth the signs of His glory may not be deprived of the outpourings of His mercy, nor despair of the showers of His favors. How all-encompassing are the wonders of His boundless grace! Behold how they have pervaded the whole of creation. Such is their virtue that not a single atom in the entire universe can be found which doth not declare the evidences of His might, which doth not glorify His holy Name, or is not expressive of the effulgent light of His unity. So perfect and comprehensive is His creation that no mind nor heart, however keen or pure, can ever grasp the nature of the most insignificant of His creatures; much less fathom the mystery of Him Who is the Day Star of Truth, Who is the invisible and unknowable Essence. The conceptions of the devoutest of mystics, the attainments of the most accomplished amongst men, the highest praise which human tongue or pen can render are all the product of man's finite mind and are conditioned by its limitations. Ten thousand Prophets, each a Moses, are thunderstruck upon the Sinai of their search at His forbidding voice, "Thou shalt never behold Me!"; whilst a myriad Messengers, each as great as Jesus, stand dismayed upon their heavenly thrones by the interdiction, "Mine Essence thou shalt never apprehend!" From time immemorial He hath been veiled in the ineffable sanctity of His exalted Self, and will everlastingly continue to be wrapt in the impenetrable mystery of His unknowable Essence. Every attempt to attain to an understanding of His inaccessible Reality hath ended in complete bewilderment, and every effort to approach His exalted Self and envisage His Essence hath resulted in hopelessness and failure. 
- Baha’u’llah  ('Gleanings from the Writings of Baha’u’llah')

The sanctity of the heavenly Gospel

We have also heard a number of the foolish of the earth assert that the genuine text of the heavenly Gospel doth not exist amongst the Christians, that it hath ascended unto heaven. How grievously they have erred! How oblivious of the fact that such a statement imputeth the gravest injustice and tyranny to a gracious and loving Providence! How could God, when once the Day-star of the beauty of Jesus had disappeared from the sight of His people, and ascended unto the fourth heaven, cause His holy Book, His most great testimony amongst His creatures, to disappear also? What would be left to that people to cling to from the setting of the day-star of Jesus … 
- Baha’u’llah  ('The Book of Certitude')

Significance of Christ's crucifixion

That which thou hast heard concerning Abraham, the Friend of the All-Merciful, is the truth, and no doubt is there about it. The Voice of God commanded Him to offer up Ishmael as a sacrifice, so that His steadfastness in the Faith of God and His detachment from all else but Him may be demonstrated unto men. The purpose of God, moreover, was to sacrifice him as a ransom for the sins and iniquities of all the peoples of the earth. This same honor, Jesus, the Son of Mary, besought the one true God, exalted be His name and glory, to confer upon Him. 
- Baha’u’llah  ('Gleanings from the Writings of Baha’u’llah')

Christ's remarks concerning His passing

To them that are endowed with understanding, it is clear and manifest that when the fire of the love of Jesus consumed the veils of Jewish limitations, and His authority was made apparent and partially enforced, He the Revealer of the unseen Beauty, addressing one day His disciples, referred unto His passing, and, kindling in their hearts the fire of bereavement, said unto them: “I go away and come again unto you.” And in another place He said: “I go and another will come Who will tell you all that I have not told you, and will fulfil all that I have said.” Both these sayings have but one meaning, were you to ponder upon the Manifestations of the Unity of God with divine insight. 
- Baha’u’llah  ('The Book of Certitude')

The extent of the sufferings of Jesus

And when the days of Moses were ended, and the light of Jesus, shining forth from the dayspring of the Spirit, encompassed the world, all the people of Israel arose in protest against Him. 
- Baha’u’llah  ('The Book of Certitude')

Reflect how Jesus, the Spirit of God, was, notwithstanding His extreme meekness and perfect tender-heartedness, treated by His enemies. So fierce was the opposition which He, the Essence of Being and Lord of the visible and invisible, had to face, that He had nowhere to lay His head. He wandered continually from place to place, deprived of a permanent abode. 
- Baha’u’llah  ('Gleanings from the Writings of Baha’u’llah')

Opposition to Christ from the learned and the divines of His generation

… call thou to mind the one who sentenced Jesus to death. He was the most learned of his age in his own country, whilst he who was only a fisherman believed in Him. Take good heed and be of them that observe the warning.
- Baha’u’llah  ('Tablets of Baha’u’llah Revealed after the Kitab-i-Aqdas')

… in the days of Jesus, it was those who were distinguished for their learning, the men of letters and religion, who denied Him, whilst humble fishermen made haste to gain admittance into the Kingdom.
- Baha’u’llah  (quoted by the Universal House of Justice in the 'Notes' section of 'Kitab-i-Aqdas')

Consider the Dispensation of Jesus Christ. Behold, how all the learned men of that generation, though eagerly anticipating the coming of the Promised One, have nevertheless denied Him. Both Annas, the most learned among the divines of His day, and Caiaphas, the high priest, denounced Him and pronounced the sentence of His death.
- Baha’u’llah  ('Gleanings from the Writings of Baha’u’llah')

Jesus fulfilled Jewish prophecies

… Israel refused to apprehend the meaning of such words as have been revealed in the Bible concerning the signs of the coming Revelation. As she never grasped their true significance, and, to outward seeming, such events never came to pass, she, therefore, remained deprived of recognizing the beauty of Jesus and of beholding the face of God. And they still await His coming! From time immemorial even unto this day, all the kindreds and peoples of the earth have clung to such fanciful and unseemly thoughts, and thus have deprived themselves of the clear waters streaming from the springs of purity and holiness.
- Baha’u’llah  (The Book of Certitude)

Sufferings of Mary - the Mother of Christ

Likewise, reflect upon the state and condition of Mary. So deep was the perplexity of that most beauteous countenance, so grievous her case, that she bitterly regretted she had ever been born. To this beareth witness the text of the sacred verse wherein it is mentioned that after Mary had given birth to Jesus, she bemoaned her plight and cried out: “O would that I had died ere this, and been a thing forgotten, forgotten quite!” I swear by God! Such lamenting consumeth the heart and shaketh the being. Such consternation of soul, such despondency, could have been caused by no other than the censure of the enemy and the cavilings of the infidel and perverse. Reflect, what answer could Mary have given to the people around her? How could she claim that a Babe Whose father was unknown had been conceived of the Holy Ghost? Therefore did Mary, that veiled and immortal Countenance, take up her Child and return unto her home. No sooner had the eyes of the people fallen upon her than they raised their voice saying: “O sister of Aaron! Thy father was not a man of wickedness, nor unchaste thy mother.”
- Baha’u’llah  ('The Book of Certitude')

Signs of Christ's approaching birth

… when the hour of the Revelation of Jesus drew nigh, a few of the Magi, aware that the star of Jesus had appeared in heaven, sought and followed it, till they came unto the city which was the seat of the Kingdom of Herod. The sway of his sovereignty in those days embraced the whole of that land.

These Magi said: “Where is He that is born King of the Jews? for we have seen His star in the east and are come to worship Him!” [Matthew 2:2] When they had searched, they found out that in Bethlehem, in the land of Judea, the Child had been born. This was the sign that was manifested in the visible heaven. As to the sign in the invisible heaven—the heaven of divine knowledge and understanding—it was Yahya, son of Zachariah, who gave unto the people the tidings of the Manifestation of Jesus. Even as He hath revealed: “God announceth Yahya to thee, who shall bear witness unto the Word from God, and a great one and chaste.” [Qur'án 3:39] By the term “Word” is meant Jesus, Whose coming Yahya foretold. Moreover, in the heavenly Scriptures it is written: “John the Baptist was preaching in the wilderness of Judea, and saying, Repent ye: for the Kingdom of heaven is at hand.” [Matthew 3:1-2]  By John is meant Yahya.

- Baha’u’llah  ('The Book of Certitude')