One alone does not help, but rather he who unites with many at the right moment.

Animals, we have been told, are taught by their organs. Yes, I would add, and so are men, but men have this further advantage that they can also teach their organs in return.

Nothing is more consonant with Nature than that she puts into operation in the smallest detail that which she intends as a whole.

The beginning of faith is the beginning of fruitfulness; but the beginning of unbelief, however glittering, is empty.

If you must tell me your opinions, tell me what you believe in. I have plenty of doubts of my own.

Nature is, after all, the only book that offers important content on every page.

The flowers are full of honey, but only the bee finds out the sweetness.