Novelty is indeed necessary to preserve eagerness and alacrity; but art and nature have stores inexhaustible by human intellects, and every moment produces something new to him who has quickened his faculties by diligent observation.

When any fit of gloominess, or perversion of mind, lays hold upon you, make it a rule not to publish it by complaints, but exert your whole care to hide it; by endeavouring to hide it; you will dry it away. Be always busy.

The roads of science are narrow, so that they who travel them, must wither follow or meet one another.

Few of those who fill the world with books, have any pretensions to the hope either of pleasing or instructing. They have often no other task than to lay two books before them, out of which they compile a third, without any new material of their own, and with very little application of judgment to those which former authors have supplied.

Ignorance is mere privation by which nothing can be produced: it is a vacuity in which the soul sits motionless and torpid for want of attraction: and, without knowing why, we always rejoice when we learn, and grieve when we forget.

To be happy at home is the ultimate result of all ambition, the end to which every enterprise and labor tends, and of which every desire prompts the prosecution.

What a strange narrowness of mind now is that, to think the things we have not known are better than the things we have known.