The heart has eyes which the brain knows nothing of.

A man's longest purposes will be his best purposes. It is true, life is short and uncertain; but it is better to live on the short arc of a large circle than to describe the whole circumference of a small circle.

It is all a mistake that we cannot be good and manly without being scrupulously and studiously good. There is too much mechanism about our virtue.

Science is busy with the hither-end of things, not the thither-end.

Science has not solved difficulties, only shifted the points of difficulty.

Laws of Nature are God's thoughts thinking themselves out in the orbs and the tides.

So far from genius discarding law, rather is it the supreme joy of genius to re-enact the eternal and unwritten law in the chamber of its own intel-lect.