'Thief' in the Bible

'Verily, verily, I say to you, He who is not entering through the door to the fold of the sheep, but is going up from another side, that one is a thief and a robber;

The thief doth not come, except that he may steal, and kill, and destroy; I came that they may have life, and may have it abundantly.

and he said this, not because he was caring for the poor, but because he was a thief, and had the bag, and what things were put in he was carrying.