For all good and evil, whether in the body or in human nature, originates ... in the soul, and overflows from thence, as from the head into the eyes.

Seek truth while you are young, for if you do not, it will later escape your grasp

The soul takes flight to the world that is invisible but there arriving she is sure of bliss and forever dwells in paradise.

More will be accomplished, and better, and with more ease, if every man does what he is best fitted to do, and nothing else.

If someone separated the art of counting and measuring and weighing from all the other arts, what was left of each (of the others) would be, so to speak, insignificant.

Harmony is a symphony, and symphony is an agreement; but an agreement of disagreements while they disagree there cannot be; you cannot harmonize that which disagrees.

Lessons, however, that enter the soul against its will never grow roots and will never be preserved inside it.