It is not usually our ideas that make us optimistic or pessimistic, but it is our optimism or pessimism of physiological or pathological origin that makes our ideas.

The only way to give finality to the world is to give it consciousness.

Fascism is cured by reading, and racism is cured by traveling

A lot of good arguments are spoiled by some fool who knows what he is talking about.

It is sad not to love, but it is much sadder not to be able to love.

Love is the child of illusion and the parent of disillusion.

The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.

Only in solitude do we find ourselves; and in finding ourselves, we find in ourselves all our brothers in solitude.

We should try to be the parents of our future rather than the offspring of our past.

Suffering is the substance of life and the root of personality, for it is only suffering that makes us persons.

Only he who attempts the absurd is capable of achieving the impossible.

The knowledge of Christ which is produced by man's own cleverness and wisdom is not a rock that can stand firm.

How we look at life depends on how we see ourselves.

I once asked him why he smoked the world's most expensive cigarette, and he told me it was because he was a man of wealth and taste, at least according to Mick Jagger.

Our family never had any hard luck because nothing seemed hard luck to it nor was it ever disgraced for there was nothing which it would acknowledge as disgrace.

Every age has a keyhole to which its eye is pasted.

We believe the world changes when the boldest thinking is directed at the toughest problems

I am not fond of the idea of my shrubberies being always approachable.

I would never speculate on the limit. Every time you speculate, you're way too conservative

Love is never wasted, even if it is not reciprocated.

If we want to sum up the theory of evolution by natural selection in two words, which have great relevance for all societies and businesses, we should simply remember: diversity works.