When counting, try not to mix chickens with blessings.

I'm not contented to capture the world. I want to change it.

No human investigation can claim to be scientific if it doesn't pass the test of mathematical proof.

The fox when it sees a flock of herons or magpies or birds of that kind, suddenly flings himself on the ground with his mouth open to look as he were dead; and these birds want to peck at his tongue, and he bites off their heads.

Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason.

Darkness is absence of light. Shadow is diminution of light.

The days are long enough for those who use them.