With God thoughts are colors, with us they are pigments-even the most abstract one may be accompanied by physical pain.

Imagine the world so greatly magnified that particles of light look like twenty-four-pound cannon balls.

Perhaps in time the so-called Dark Ages will be thought of as including our own.

If you are going to build something in the air it is always better to build castles than houses of cards.

The thoughts written on the walls of madhouses by their inmates might be worth publicizing.

If it were true what in the end would be gained? Nothing but another truth. Is this such a mighty advantage? We have enough old truths still to digest, and even these we would be quite unable to endure if we did not sometimes flavor them with lies.

Be attentive, feel nothing in vain, measure and compare: this is the whole law of philosophy.