Life should be great rather than long.
Everything existing in the universe is the fruit of chance and necessity.
The gratification of wealth is not found in mere possession or in lavish expenditure, but in its wise application.
The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane.
A wise girl kisses but doesn't love, listens but doesn't believe, and leaves before she is left.
In the end, everything is a gag.
The 'good old times'-all times, when old, are good.
Don't go around saying the world owes you a living. The world owes you nothing. It was here first.
Don't be too timid and squeamish about your actions. All life is an experiment. The more experiments you make the better.
First, then, God, being all-just, wishes to do justice; being all-wise, knows what justice is; being all-powerful, can do justice. Why then injustice?
Symbols are the imaginative signposts of life.
Sometimes - history needs a push.
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.
Science is the outcome of being prepared to live without certainty and therefore a mark of maturity. It embraces doubt and loose ends.
Doubt must be no more than vigilance, otherwise it can become dangerous.
History repeats itself, first as tragedy, second as farce.
Life belongs to the living, and he who lives must be prepared for changes
Nothing exists except atoms and empty space; everything else is opinion.
Courage is a kind of salvation.
Our life is frittered away by detail. Simplify, simplify.