In youth it is the outward aspect of things that most engages us; while in age, thought or reflection is the predominating qualityof the mind. Hence, youth is the time for poetry, and age is more inclined to philosophy. In practical affairs it is the same: a man shapes his resolutions in youth more by the impression that the outward world makes upon him; whereas, when he is old, it is thought that determines his actions.

there are very few who can think, but every man wants to have an opinion; and what remains but to take it ready-made from others, instead of forming opinions for himself?

No one knows what capacities for doing and suffering he has in himself, until something comes to rouse them to activity: just as in a pond of still water, lying there like a mirror, there is no sign of the roar and thunder with which it can leap from the precipice, and yet remain what it is; or again, rise high in the air as a fountain. When water is as cold as ice, you can have no idea of the latent warmth contained in it.

It is only in the microscope that our life looks so big.

The happiness which we receive from ourselves is greater than that which we obtain from our surroundings. . . . The world in which a person lives shapes itself chiefly by the way in which he or she looks at it.

Any foolish boy can stamp on a beetle, but all the professors in the world cannot make a beetle.

Almost all of our sorrows spring out of our relations with other people.