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

To render aid to the worthless is sheer waste. Rain does not freshen the Dead Sea, but only enables it to dissolve more salt..

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

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

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..

A superstition is a premature explanation that overstays its time..

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 c….

Truth is better disengaged from error than torn from it..

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

Boundaries which mark off one field of science from another are purely artificial, are set up only for temporary convenience. Let chemists and physic….

Dumbness and silence are two different things..

They will listen with both ears to what is said by the men just a step or two ahead of them, who stand nearest to them, and within arm's reach. A gui….

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

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

Is any knowledge worthless? Try to think of an example..

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

Some young folks have wind-fall minds, prematurely detached from the tree of knowledge for a life-long sourness and pettiness..

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

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..

Educated folk keep to one another's company too much, leaving other people much like milk skimmed of its cream..

Evolution pays and that is why there is evolution.