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

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.

Nature is full of by-ends. A moth feeds on a petal, in a moment the pollen caught on its breast will be wedding this blossom to another in the next county.

We despair of changing the habits of men, still we would alter institutions, the habits of millions of men.

Boundaries which mark off one field of science from another are purely artificial, are set up only for temporary convenience. Let chemists and physicists dig deep enough, and they reach common ground.

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

No gun is perfectly true. So the marksman, that he may hit the bull's-eye, points elsewhere.