average human “looks without seeing, listens without hearing, touches without feeling, eats without tasting, moves without physical awareness, inhales without awareness of odour or fragrance, and talks without thinking.

Experience does not err. Only your judgments err by expecting from her what is not in her power.

Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!

He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.

A man of supreme folly: his life flies away while he is merely hoping to enjoy it.

It is no small benefit on finding oneself in bed in the dark to go over again in the imagination the main lines of the forms previously studied, or other noteworthy things conceived by ingenious speculation.

Medicine is the restoration of discordant elements; sickness is the discord of the elements infused into the living body.