Dumbness and silence are two different things.

Ignorance may find a truth on its doorstep that erudition vainly seeks in the stars.

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

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

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

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.

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