The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.

And it is true, best is nothing concealed which shall not be discovered; for which cause a marvellous being shall come after me, who as yet lives not, and who shall reveal many things.

For it is we who must pray for our daily bread, and if He grants it to us, it is only through our labour, our skill and preparation.

Once a disease has entered the body, all parts which are healthy must fight it: not one alone, but all. Because a disease might mean their common death. Nature knows this; and Nature attacks the disease with whatever help she can muster.

Everything is a drug; it depends on the dose.

Every physician must be rich in knowledge, and not only of that which is written in books; his patients should be his book, they will never mislead him.

If we want to make a statement about a man's nature on the basis of his physiognomy, we must take everything into account; it is in his distress that a man is tested, for then his nature is revealed.