On entering this world our starting-point is ignorance. None, however, but idiots remain there.

Great knowledge is requisite to instruct those who have been well instructed, but still greater knowledge is requisite to instruct those who have been neglected.

Knowledge is a mimic creation.

The most formidable attribute of temptation is its increasing power, its accelerating ratio of velocity. Every act of repetition increases power, diminishes resistance. It is like the letting out of waters-where a drop can go, a river can go. Whoever yields to temptation, subjects himself to the law of falling bodies.

A teacher who is attempting to teach without inspiring the pupil with a desire to learn is hammering on cold iron.

It is well, when the wise and the learned discover new truths; but how much better to diffuse the truths already discovered, amongst the multitude! Every addition to true knowledge is an addition to human power; and while a philosopher is discovering one new truth, millions may be propagated amongst the people. Diffusion, then, rather than discovery, is the duty of our government.

If there is anything for which I would go back to childhood, and live this weary life over again, it is for the burning, exalting, transporting thrill and ecstasy with which the young faculties hold their earliest communion with knowledge.