The human understanding is unquiet; it cannot stop or rest, and still presses onward, but in vain. Therefore it is that we cannot conceive of any end or limit to the world, but always as of necessity it occurs to us that there is something beyond... But he is no less an unskilled and shallow philosopher who seeks causes of that which is most general, than he who in things subordinate and subaltern omits to do so

Great art is deeply ordered. Even if within the order there may be enormously instinctive and accidental things, nevertheless they come out of a desire for ordering and for returning fact onto the nervous system in a more violent way.

The subtlety of nature is greater many times over than the subtlety of the senses and understanding.

As you work, the mood grows on you. There are certain images which suddenly get hold of me and I really want to do them. But it's true to say that the excitement and possibilities are in the working and obviously can only come in the working.

The eye of understanding is like the eye of the sense; for as you may see great objects through small crannies or levels, so you may see great axioms of nature through small and contemptible instances.

Fortitude is the marshal of thought, the armor of the will, and the fort of reason.

Medical men do not know the drugs they use, nor their prices.