Where parents do too much for their children, the children will not do much for themselves.

Theology, by diverting the attention of men from this life to another, and by endeavoring to coerce all men into one religion, constantly preaching that this world is full of misery, but the next world would be beautiful - or not, as the case may be - has forced on men the thought of fear where otherwise there might have been the happy abandon of nature.

What boy well raised can compare with your street gamin who has the knowledge and the shrewdness of a grown-up broker.

In the Life of Darwin by his son, there is related an incident of how the great naturalist once studied long as to just what a certain spore was. Finally he said, "It is this, for if it isn't, then what is it?" And all during his life he was never able to forget that he had been guilty of this unscientific attitude, for science is founded on certitude, not assumption.

As a rule, the man who can do all things equally well is a very mediocre individual.

The product of the head, heart and hand is a thing to be loved.

Wise Man: One who sees the storm coming before the clouds appear.