Could we but rightly comprehend the mind of man, nothing would be impossible to us upon the earth.

The universities do not teach all things ... so a doctor must seek out old wives, gypsies, sorcerers, wandering tribes, old robbers, and such outlaws and take lessons from them. A doctor must be a traveller . . . Knowledge is experience.

Nothing is hidden so much that it wouldn't be revealed through its fruit.

The physician must give heed to the region in which the patient lives, that is to say, to its type and peculiarities.

The art of medicine has its roots in the heart.

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.

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.