Common Sense is that which judges the things given to it by other senses.

Men of lofty genius when they are doing the least work are most active.

Nothing is more apt to deceive us than our own judgment of our work. We derive more benefit from having our faults pointed out by our enemies than from hearing the opinions of friends.

Man's external form, marvellously constructed, is not much as compared with the divine soul that dwells inside that structure.

Especially learn how to see.

While you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.

Being engulfed in practice without delicate knowledge related to it, is in many ways like entering a ship without knowing where it is headed.