Men must be able to engage in ...

Men must be able to engage in business and go to war, but leisure and peace are better; they must do what is necessary and indeed what is useful, but what is honorable is better. On such principles children and persons of every age which requires education should be trained.
Men must be able to engage in business and go to war, but leisure and peace are better; they must do what is necessary and indeed what is useful, but what is honorable is better. On such principles children and persons of every age which requires education should be trained.

Quotes from the same author

It is the mark of an educated mind to be able to entertain a thought without accepting it.
Change in all things is sweet.
Well begun is half done.
In all things of nature there is something of the marvelous.
Happiness depends upon ourselves.