'Thief' in the Bible

"In most solemn truth I tell you that the man who does not enter the sheepfold by the door, but climbs over some other way, is a thief and a robber.

The thief comes only to steal and kill and destroy: I have come that they may have Life, and may have it in abundance.

The reason he said this was not that he cared for the poor, but that he was a thief, and that being in charge of the money-box, he used to steal what was put into it.