At times I think and at times I am.
That which has always been accepted by everyone, everywhere, is almost certain to be false.
The trouble with our times is that the future is not what it used to be.
That which has been believed by everyone, always and everywhere, has every chance of being false.
Two dangers constantly threaten the world: order and disorder.
The future, like everything else, is not what it used to be.
Science means simply the aggregate of all the recipes that are always successful. All the rest is literature.
Man’s great misfortune is that he has no organ, no kind of eyelid or brake, to mask or block a thought, or all thought, when he wants to.
We are enriched by our reciprocate differences.
Serious-minded people have few ideas. People with ideas are never serious.