Nothing cools so fast as undue enthusiasm. Water that has boiled freezes sooner than any other.

When we try to imagine a chaos we fail. ... In its very fiber the mind is an order and refuses to build a chaos.

Ten builders rear an arch, each in turn lifting it higher; but it is the tenth man, who drops in the keystone, who hears our huzzas.

Form may be of more account than substance. A lens of ice will focus a solar beam to a blaze.

A man's own addition to what he learns is cement to bind an otherwise loose heap of stones into a structure of unity, strength, and use.

Discovery begins by finding the discoverer.

Evolution pays and that is why there is evolution