"My travels have developed me; no man becomes a master at home, nor finds his teacher behind the stove. Sicknesses wander here and there the whole length of the world. If a man wishes to understand them, he must wander too. A doctor must be an alchemist, he must see mother earth where the minerals grow. And as the mountains will not come to him, he must go to the mountains. It is indeed true that those who do not roam have greater possessions than those who do; those who sit behind the stove eat partridge, and those who follow after knowledge eat milkbroth. He who will serve the belly-- he will not follow after me."