Answer by George Townshend:
Jesus said to His disciples, "...lo, I am with you always, even unto the end of the world." (Matt. 28:20)
He also said to His disciples. "...I go away and come again unto you... (John 14:28)
These are two distinct promises. The first refers to His continuing presence through the Holy Spirit. The second to His departure and His return. (George Townshend, Questions About the Second Coming Asked by Baha'is of Kampala, Uganda, Africa: Answers by George Townshend; Wilmette, Baha'i Publishing Committee, 1953)