言论·语录·格言:

He is truly wise who gains wisdom from another's mishap.

He knows not how to know who knows not also how to unknow.
-- Sir Richard Burton

He that composes himself is wiser than he that composes a book.
-- B. Franklin

He thought of Musashi, the Sword Saint, standing in his garden more than
three hundred years ago. "What is the 'Body of a rock'?" he was asked.
In answer, Musashi summoned a pupil of his and bid him kill himself by
slashing his abdomen with a knife. Just as the pupil was about to comply,
the Master stayed his hand, saying, "That is the 'Body of a rock'."
-- Eric Van Lustbader

He who despairs over an event is a coward, but he who holds hopes for
the human condition is a fool.
-- Albert Camus

He who knows not and knows that he knows not is ignorant. Teach him.
He who knows not and knows not that he knows not is a fool. Shun him.
He who knows and knows not that he knows is asleep. Wake him.

He who knows nothing, knows nothing.
But he who knows he knows nothing knows something.
And he who knows someone whose friend's wife's brother knows nothing,
he knows something. Or something like that.

He who knows others is wise.
He who knows himself is enlightened.
-- Lao Tsu

He who knows that enough is enough will always have enough.
-- Lao Tsu

He who knows, does not speak. He who speaks, does not know.
-- Lao Tsu

...He who laughs does not believe in what he laughs at, but neither
does he hate it. Therefore, laughing at evil means not preparing oneself to
combat it, and laughing at good means denying the power through which good is
self-propagating.
-- Umberto Eco, "The Name of the Rose"

Here is a test to find whether your mission on earth is finished:
if you're alive, it isn't.

How can you prove whether at this moment we are sleeping, and all our
thoughts are a dream; or whether we are awake, and talking to one another
in the waking state?
-- Plato