Everything in science depends on what one calls an aperçu, on becoming aware of what is at the bottom of the phenomena. Such becoming aware is infinitely fertile.

If you call a thing bad you do little, if you call a thing good you do much

Where a man has a passion for meditating without the capacity of thinking, a particular idea fixes itself fast, and soon creates a mental disease.

Who can think wise or stupid things at all that were not thought already in the past.

One mind is enough for a thousand hands.

The happy do not believe in miracles.

A rainbow which lasts for a quarter of an hour is looked at no longer.