Trust

Genesis 39:4
 
And all that [Potiphar] had he put into his hand.
Finally Potiphar is able to trust Joseph, not just with regular tasks, but apparently with his financial affairs too. A Christian must be trustworthy. Stealing should never be a problem for us. We must be absolutely honest in everything that we do. A great witness to the unsaved is that, in a world where many people are only looking out for themselves, there are those who actually can be trusted.