All wealth is the product of labor.

Crooked things may be as stiff and unflexible as streight: and Men may be as positive and peremptory in Error as in Truth.

How much education may reconcile young people to pain and sufference, the examples of Sparta do sufficiently shew; and they who have once brought themselves not to think bodily pain the greatest of evils, or that which they ought to stand most in fear of, have made no small advance toward virtue.

The necessity of pursuing true happiness is the foundation of all liberty- Happiness, in its full extent, is the utmost pleasure we are capable of.

No man's knowledge here can go beyond his experience.

Set the mind to work, and apply the thoughts vigorously to the business, for it holds in the struggles of the mind, as in those of war, that to think we shall conquer is to conquer.

The difference, so observable in men's understandings and parts, does not arise so much from their natural faculties, as acquired habits.