'Thief' in the Bible

Truly I say to you, He who does not go through the door into the place where the sheep are kept, but gets in by some other way, is a thief and an outlaw.

The thief comes only to take the sheep and to put them to death: he comes for their destruction: I have come so that they may have life and have it in greater measure.

(He said this, not because he had any love for the poor; but because he was a thief, and, having the money-bag, took for himself what was put into it.)