Contradiction with Matthew 24:35
This verse is not a contradiction as it states the same idea about heaven and earth passing away but not Christ's words, mirroring Mark 13:31 entirely.
Matthew 24:35: Heaven and earth shall pass away, but my words shall not pass away.
Contradiction with Revelation 21:1
Contradicts Mark 13:31 by affirming the passing away of the current heaven and earth, similar to Mark 13:31, yet introduces the new heaven and new earth without specific mention of Christ's words.
Revelation 21:1: And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
Paradox #1
The contradiction or conflict in this verse could be seen in the permanence of words versus actions. If one believes actions are more important than words, this verse might seem contradictory. It emphasizes the eternal nature of words, which some may see as inconsistent if they value deeds over words.