Memory... is an internal rumor.

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it. In the first stage of life the mind is frivolous and easily distracted; it misses progress by failing in consecutiveness and persistence. This is the condition of children and barbarians, in which instinct has learned nothing from experience.

Philosophy may describe unreasoning, as it may describe force; it cannot hope to refute them.

There is a kind of courtesy in skepticism. It would be an offense against polite conventions to press our doubts too far.

Philosophers are very severe towards other philosophers because they expect too much.

The family is an early expedient and in many ways irrational. If the race had developed a special sexless class to be nurses, pedagogues, and slaves, like the workers among ants and bees, then the family would have been unnecessary. Such a division of labor would doubtless have involved evils of its own, but it would have obviated some drags and vexations proper to the family.

To be brief is almost a condition of being inspired.