Day 71 - Chapter 14, Verses 10-11

Then Judas Iscariot, one of the Twelve, went off to the chief priests to hand him over to them.
When they heard him they were pleased and promised to pay him money. Then he looked for an opportunity to hand him over.

This is such a sad passage. Despite centuries of speculation, we have no idea of what motivated Judas. How do you make sense of inexplicable evil?