A society grows great when old men plant trees whose shade they know they shall never sit in.

A society grows great when old men plant trees whose shade they know they shall never sit in.

Every man...should periodically be compelled to listen to opinions which are infuriating to him. To hear nothing but what is read more

Every man...should periodically be compelled to listen to opinions which are infuriating to him. To hear nothing but what is pleasing to one is to make a pillow of the mind.

A lie would have no sense unless the truth were felt dangerous.

A lie would have no sense unless the truth were felt dangerous.

The theory of evolution must be considered as a scientific theory, as theory, that is, proposed to explain or systemize read more

The theory of evolution must be considered as a scientific theory, as theory, that is, proposed to explain or systemize a set of facts, and that no one has any claim to be considered as a serious rival to Darwin in the "discovery" of this theory who did not conduct his evolutionary studies upon a reasonably wide basis of facts. To have ideas, apercus, is not enough, and it is the overevalutation of such clever but uncontrolled guesses which is apt to produce the ludicrous fallacy of combination, in which fragments of the final theory are collected from widely scattered sources and are combined in such a way as to impugn the originality of him who was the first to see how such a synthesis was possible.

The reason teaching has to go on is that children are not born human; they are made so.

The reason teaching has to go on is that children are not born human; they are made so.

Not a shred of evidence exists in favor of the idea that life is serious.

Not a shred of evidence exists in favor of the idea that life is serious.

Problems are only opportunities in work clothes.

Problems are only opportunities in work clothes.

We often despise what is most useful to us.

We often despise what is most useful to us.

The classes and the masses.

The classes and the masses.