The spirit desires to remain with its body, because, without the organic instruments of that body, it can neither act, nor feel anything.
The painter who draws merely by practice and by eye, without any reason, is like a mirror which copies every thing placed in front of it without being conscious of their existence.
The motive power is the cause of all life.
The memory of benefits is a frail defence against ingratitude.
The limiting surface of one thing is the beginning of another.
The knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.
The greatest deception men suffer is from their own opinions.
The grave will fall in upon him who digs it.
The eye which turns from a white object in the light of the sun and goes into a less fully lighted place will see everything as dark.
The eye — which sees all objects reversed — retains the images for some time.
The Common Sense, is that which judges of things offered to it by the other senses.
The boundaries of bodies are the least of all things.