If your life doesn't end in failure, you haven't reached high enough. So it was failure I had to achieve.

In all ages, far back into prehistory, we find human beings have painted and adorned themselves.

My days I devote to reading and experiments in chemistry, and I spend many of the clear nights in the study of astronomy. There is, though I do not know how there is or why there is, a sense of infinite peace and protection in the glittering hosts of heaven. There it must be, I think, in the vast and eternal laws of matter, and not in the daily cares and sins and troubles of men, that whatever is more than animal within us must find its solace and its hope.

The past is the beginning of the beginning and all that is and has been is but the twilight of the dawn.

Alexander the Great changed a few boundaries and killed a few men. Both he and Napoleon were forced into fame by circumstances outside of themselves and by currents of the time, but Margaret Sanger made currents and circumstances. When the history of our civilization is written, it will be a biological history and Margaret Sanger will be its heroine.

If you fell down yesterday, stand up today.

Sailors ought never to go to church. They ought to go to hell, where it is much more comfortable.