Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow.

What the eyes perceive in herbs or stones or trees is not yet a remedy; the eyes see only the dross.

Then God sends us such a messenger who appears to us in spirit, warns us, consoles us, teaches us, and brings us His good tidings.

Man is ill because he is never still.

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.

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.

Men who are devoid of the power of spiritual perception are unable to recognize anything that cannot be seen externally.