Christ did not attain His Messianic station and His perfections at the moment of His baptism, when the Holy Spirit descended upon Him in the form of a dove – He was already and “has always been, and will ever remain, in the loftiest heights of sanctity”

But as to that holy Reality of which Christ says “the Father is in the Son”, [Cf. John 14:11 and 17:21] it has neither beginning nor end: Its “beginning” refers merely to His revelation of His own station. Thus, by way of analogy, He likens His silence to sleep: A man who is silent is like one who is asleep, and when he speaks, it is as though he has awakened. And yet the sleeping and the wakeful man are one and the same person: No change has taken place in his station, his loftiness, sublimity, inner reality, or innate nature. It is merely that the condition of silence has been likened to sleep, and that of manifestation to wakefulness. A man, whether sleeping or awake, is the same man: Sleep is simply one possible state, and wakefulness another. And so it is that the period of silence is compared to sleep, and the period of manifestation and guidance to wakefulness.

In the Gospel it is said: “In the beginning was the Word, and the Word was with God.” It follows then that Christ did not attain His Messianic station and His perfections at the moment of His baptism, when the Holy Spirit descended upon Him in the form of a dove. Rather, the Word of God has always been, and will ever remain, in the loftiest heights of sanctity. 
- ‘Abdu’l-Baha  (Excerpt from a table talk, authenticated by ‘Abdu’l-Baha; ‘Some Answered Questions’ – 2014 revised translation by the Baha’i World Centre. To see the entire talks please visit ‘Talks of ‘Abdu’l-Baha’)