I entreat all artisans faithfully to follow their craft and take delight in it. I entreat all servants to be faithful servants of their masters and mistresses.

I entreat masters to live a good life and faithfully to instruct their scholars, especially that they may love God and learn to give themselves to knowledge, in order to promote His honour, the welfare of the state, and their own salvation, but not for the sake of avarice or the praise of man.

I entreat students of letters and other scholars to obey their masters in things good, to imitate them, and diligently apply themselves to letters for the sake of God's honour and their own salvation and that of other men.

We are servants rather than masters in mathematics.

For God is my witness that I neither preached, affirmed, nor defended them, though they say that I did.

A precept or command is a general teaching of God, obligating every man under pain of mortal sin - namely, in cases in which he has fallen away from the command. Hence, the saints who for a period of their life lived hypocritically sinned mortally for that period. So also the damned, by persistent false living, sin persistently in Hell.