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.

Doubt is the beginning, not the end, of wisdom.

A superstition is a premature explanation that overstays its time.

Discovery begins by finding the discoverer.

Degree is much: the whole Atlantic might be lukewarm and never boil us a potato.

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

Let truth be a banner big enough to hide the man who holds it up.