Do not work for food that spoils; instead, work for the food that lasts for eternal life. This is the food which the Son of Man will give you, because God, the Father, has put his mark of approval on him."

Does this sound as if we were again boasting about ourselves? Could it be that, like some other people, we need letters of recommendation to you or from you?

It is clear that Christ himself wrote this letter and sent it by us. It is written, not with ink but with the Spirit of the living God, and not on stone tablets but on human hearts.

The many miracles and wonders that prove that I am an apostle were performed among you with much patience.