The excesses of our youth are drafts upon our old age.

Self-denial is often the sacrifice of one sort of self-love for another.

Professors in every branch of the sciences, prefer their own theories to truth: the reason is that their theories are private property, but truth is common stock.

Success seems to be that which forms the distinction between confidence and conceit.

No man can purchase his virtue too dear, for it is the only thing whose value must ever increase with the price it has cost us. Our integrity is never worth so much as when we have parted with our all to keep it.

The enthusiast has been compared to a man walking in a fog; everything immediately around him, or in contact with him, appears sufficiently clear and luminous; but beyond the little circle of which he himself is the centre, all is mist and error and confusion.

He that studies books alone, will know how things ought to be; and he that studies men, will know how things are.