It is adverse to talent to be consorted and trained up with inferior minds and inferior companions, however high they may rank. The foal of the racer neither finds out his speed nor calls out his powers if pastured out with the common herd, that are destined for the collar and the yoke.

Jealousy is sustained as often by pride as by affection.

Secrecy is the soul of all great designs.

Body and mind, like man and wife, do not always agree to die together.

Some authors write nonsense in a clear style, and others sense in an obscure one; some can reason without being able to persuade, others can persuade without being able to reason; some dive so deep that they descend into darkness, and others soar so high that they give us no light; and some, in a vain attempt to be cutting and dry, give us only that which is cut and dried. We should labor, therefore, to treat with ease of things that are difficult; with familiarity, of things that are novel; and with perspicuity, of things that are profound.

There are two principles of established acceptance in morals; first, that self-interest is the mainspring of all of our actions, and secondly, that utility is the test of their value.

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.