Invention breeds invention.

Sunday is the core of our civilization, dedicated to thought and reverence.

To fill the hour; that is happiness to fill the hour, and leave no crevice for a repentance or an approval.

Steam was till the other day the devil which we dreaded. Every pot made by any human potter or brazier had a hole in its cover, to let off the enemy, lest he should lift pot and roof and carry the house away.

The growth of the intellect is spontaneous in every expansion. The mind that grows could not predict the times, the means, the mode of that spontaneity. God enters by a private door into every individual.

The secret of education lies in respecting the pupil. It is not for you to choose what he shall know, what he shall do. It is chosen and foreordained and he only holds the key to his own secret.

The borrower runs in his own debt.