How small the vastest of human catastrophes may seem, at a distance of a few million miles.

Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no need of change.

Night, the mother of fear and mystery, was coming upon me.

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.

Anthropology has been compared to a great region, marked out indeed as within the sphere of influence of science, but unsettled and for the most part unsubdued. Like all such hinterland sciences, it is a happy hunting-ground for adventurers.

When a man realizes his littleness, his greatness can appear.

Success is to be measured not by wealth, power, or fame, but by the ratio between what a man is and what he might be.