Nature is so delightful and abundant in its variations that among trees of the same kind there would not be found one which nearly resembles another, and not only the plants as a whole, but among their branches, leaves, and fruit, will not be found one which is precisely like another.

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

The human being, creature of eyes, needs the image.

Truth was the only daughter of Time.

I love those who can smile in trouble.

Everything proceeds from everything else and everything becomes everything, and everything can be turned into everything else.

The study of what is excellent is food for the mind and body.