Quite often good things have hurtful consequences. There are instances of men who have been ruined by their money or killed by their courage.

If then, as we say, good craftsmen look to the mean as they work, and if virtue, like nature, is more accurate and better than any form of art, it will follow that virtue has the quality of hitting the mean. I refer to moral virtue [not intellectual], for this is concerned with emotions and actions, in which one can have excess or deficiency or a due mean.

They should rule who are able to rule best.

Man by Nature desires to know.

This much then, is clear: in all our conduct it is the mean that is to be commended.

All men, or most men, wish what is noble but choose what is profitable; and while it is noble to render a service not with an eye to receiving one in return, it is profitable to receive one. One ought therefore, if one can, to return the equivalent of services received, and to do so willingly; for one ought not to make a man one's friend if one is unwilling to return his favors.

A speaker who is attempting to move people to thought or action must concern himself with Pathos.