Quacks pretend to cure other men's disorders, but fail to find a remedy for their own.

Through doubt we arrive at the truth.

I am much beholden to old age, which has increased my eagerness for conversation in proportion as it has lessened my appetites of hunger and thirst.

History is indeed the witness of the times, the light of truth.

Any man may make a mistake; none but a fool will stick to it. Second thoughts are best as the proverb says.

Honor is the reward of virtue.

These studies are a spur to the young, a delight to the old: an ornament in prosperity, a consoling refuge in adversity; they are pleasure for us at home, and no burden abroad; they stay up with us at night, they accompany us when we travel, they are with us in our country visits.