America is not civil, whilst Africa is barbarous.

It is very certain that the strong British race which has now overrun much of this continent, must also overrun [Texas], and Mexico and Oregon also, and it will in the course of ages be of small import by what particular occasions and methods it was done.

As the traveler who has lost his way, throws his reins on his horse's neck, and trusts to the instinct of the animal to find his road, so must we do with the divine animal who carries us through this world

In the order of nature, we cannot render benefits to those from whom we receive them, or only seldom. But the benefit we receive must be rendered again, line for line, deed for deed, cent for cent, to somebody. Beware of too much good staying in your hand. It will fast corrupt and worm worms. Pay it away quickly in some sort.

Taking to pieces is the trade of those who cannot construct.

A man must keep an eye on his servants, if he would not have them rule him.

Explore, and explore. Be neither chided nor flattered out of your position of perpetual inquiry. Neither dogmatize or accept another's dogmatism.