Everything is a drug; it depends on the dose.

The art of medicine has its roots in the heart.

It would be an error to try to build the Kingdom of Heaven upon envy. For nothing that is founded on envy can thrive; it must have another root.

From time immemorial artistic insights have been revealed to artists in their sleep and in dreams, so that at all times they ardently desired them.

Man is a microcosm, or a little world, because he is an extract from all the stars and planets of the whole firmament, from the earth and the elements; and so he is their quintessence.

The dose makes the poison.

Be not another, if you can be yourself.