'Thief' in the Bible

Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.

The thief cometh not, but for to steal, and to kill, and to destroy: I am come that they might have life, and that they might have it more abundantly.

This he said, not that he cared for the poor; but because he was a thief, and had the bag, and bare what was put therein.