Perfection doesn't exist... only good attempts.

This world cannot explain its own difficulties without the assistance of another.

The interests of society often render it expedient not to utter the whole truth, the interests of science never: for in this field we have much more to fear from the deficiency of truth than from its abundance.

Emulation looks out for merits, that she may exalt herself by a victory; envy spies out blemishes that she may lower another by defeat.

The society of dead authors has this advantage over that of the living: they never flatter us to our faces, nor slander us behind our backs, nor intrude upon our privacy, nor quit their shelves until we take them down.

Faith and works are necessary to our spiritual life as Christians, as soul and body are to our natural life as men; for faith is the soul of religion, and works the body.

Brutes leave ingratitude to man.