Never crowd youngsters about their private affairs - sex especially.

Luck is a tag given by the mediocre to account for the accomplishments of genius.

Abstract knowledge is always useful, sooner or later.

The human race divides politically into those who want people to be controlled and those who have no such desire.

There ain't no such thing as a free lunch.

If a grasshopper tries to fight a lawnmower, one may admire his courage but not his judgement.

Most people can't think, most of the remainder won't think, and the small fraction who do think mostly can't do it very well.