Epictetus, Golden Sayings 66

We see that a carpenter becomes a carpenter by learning certain things, and that a pilot, by learning certain things, becomes a pilot. 

Possibly also in the present case the mere desire to be wise and good is not enough. It is necessary to learn certain things. This is then the object of our search. 

The Philosophers would have us first learn that there is a God, and that His Providence directs the Universe. 

Further, that to hide from Him not only one's acts but even one's thoughts and intentions is impossible.

Secondly, what the nature of God is. Whatever that Nature is discovered to be, the man who would please and obey Him must strive with all his might to be made like unto him. 

If the Divine is faithful, he also must be faithful. 

If free, he also must be free.

If beneficent, he also must be beneficent.

If magnanimous, he also must be magnanimous. 

Thus as an imitator of God must he follow Him in every deed and word.