A calculating engine is one of the most intricate forms of mechanism, a telegraph key one of the simplest. But compare their value.

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.

Evolution pays and that is why there is evolution

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

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

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

Dumbness and silence are two different things.