If a sound body and a sound mind, which is as much as to say health and virtue, are to be preferred before all other considerations, ought not men, in choosing a business either for themselves or children, to refuse such as are unwholesome for the body, and such as make a man too dependent, too much obliged to please others, and too much subjected to their humors in order to be recommended and get a livelihood?

Electrical matter differs from common matter in this, that the parts of the latter mutually attract, those of the former mutually repel each other.

At twenty years of age the will reigns; at thirty, the wit; and at forty, the judgment.

The only thing that is more expensive than education is ignorance.

A man must have a good deal of vanity who believes, and a good deal of boldness who affirms, that all the doctrines he holds are true, and all he rejects are false.

A lighthouse is more useful than a church.

Creditors have better memories than debtors.