Never crowd youngsters about their private affairs - sex especially.

When railroading time comes you can railroad—but not before.

The basic of all morality is duty, a concept with the same relation to group that self-interest has to individual.

Wisdom includes not getting angry unnecessarily. The Law ignores trifles and the wise man does, too.

Everything is theoretically impossible, until it is done.

when faced with a problem you do not understand, do any part of it you do understand, then look at it again.

He never gave up his search for the Door into Summer.