He turns not back who is bound to a star.

The water which rises in the mountains is the blood which keeps the mountain in life.

Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.

Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.

Our life is made by the death of others.

Black is like a broken vessel, which is deprived of the capacity to contain anything.

Why does the eye see a thing more clearly in dreams than the imagination when awake?