“I go away and come again unto you.”

"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 fulfill all that I have said.” Both these sayings have but one meaning, were ye to ponder upon the Manifestations of the Unity of God with Divine insight."

(Gleanings from the Writings of Bahá’u’lláh. XIII, part 5)
www.bahai.org/r/997214029