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Be still. Apart from this the mind has no task to do or thought to think.
A sound mind in a sound body, is a short, but full description of a happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little the better for anything else. Men’s happiness or misery is most part of their own making. He, whose mind directs not wisely, will never take the right way; and he, whose body is crazy and feeble, will never be able to advance in it.
The mind is a continuous stream of events.
We must always question our assumptions and be willing to revise our theories in light of new evidence.
"Memory is a kind of accomplishment, a sort of renewal even."