Our greatest foes, 

and whom we must chiefly combat, 

are within.

Good actions ennoble us, 

and we are the sons of our deeds.

Every man is the son of his own works.

The most difficult character in comedy is that of the fool, 

and he must be no simpleton that plays that part.

Truth will rise above falsehood 

as oil above water.

The knowledge of yourself will preserve you from vanity.