The history of mankind for the last four centuries is rather like that of an imprisoned sleeper, stirring clumsily and uneasily while the prison that restrains and shelters him catches fire, not waking but incorporating the crackling and warmth of the fire with ancient and incongruous dreams, than like that of a man consciously awake to danger and opportunity.

Our challenge is not to educate the children we used to have or want to have, but to educate the children who come to the schoolhouse door.

If you do not want to explore an egoism you should not read autobiography.

About two-thirds of the face of Marx is beard, a vast solemn wooly uneventful beard that must have made all normal exercise impossible. It is not the sort of beard that happens to a man, it is a beard cultivated, cherished, and thrust patriarchally upon the world.

Losing your way on a journey is unfortunate. But, losing your reason for the journey is a fate more cruel.

The study of Nature makes a man at last as remorseless as Nature.

Fools make researches and wise men exploit them - that is our earthly way of dealing with the question, and we thank Heaven for an assumed abundance of financially impotent and sufficiently ingenious fools.