A chiasm is a literary structure where vocabulary of the first section of a passage is repeated in reverse order in the second. The center of the chiasm is typically the climax of the passage. In Mark 10:31-45 the center and climax is Jesus telling James and John that they don’t know what they are asking for when they asked to be on his right and on his left in his glory, not realizing that Jesus’ glory was the cross and those on his right and left would be the two thieves (Mark 10:37-40).