Contradiction with Matthew 28:20
In this verse, Jesus promises to be with His disciples always, yet in Mark 8:13, He physically departs from them.
Matthew 28:20: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, [even] unto the end of the world. Amen.
Contradiction with John 14:18
Jesus promises not to leave His disciples as orphans, but Mark 8:13 involves Him leaving and departing.
John 14:18: I will not leave you comfortless: I will come to you. [comfortless: or, orphans]
Contradiction with John 16:28
Jesus speaks of coming forth from the Father and coming into the world, with the implication of a return, contrasting with the immediate physical departure in Mark 8:13.
John 16:28: I came forth from the Father, and am come into the world: again, I leave the world, and go to the Father.
Contradiction with Matthew 16:4
Jesus mentions a wicked generation seeking a sign and departs, which emphasizes disbelief and contrasts with the idea of presence for guidance or reassurance.
Matthew 16:4: A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.
Contradiction with Luke 24:51
Jesus is carried up into heaven rather than merely departing by ship, indicating a different kind of departure.
Luke 24:51: And it came to pass, while he blessed them, he was parted from them, and carried up into heaven.