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

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

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 guide ceases to be of any use when he strides so far ahead as to be hidden by the curvature of the earth.

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

When a learner, in the fullness of his powers, comes to great truths unstaled by premature familiarity, he rejoices in the lateness of his lessons.

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

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