"The proof of a well-trained mind is..." - Quote by Marcus Tullius Cicero
The proof of a well-trained mind is that it rejoices in which is good and grieves at the opposite.
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More by Marcus Tullius Cicero
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“The mind, in short, works on the data it receives very much as a sculptor works on his block of stone. In a sense the statue stoodthere from eternity. But there were a thousand different ones beside it, and the sculptor alone is to thank for having extricated this one from the rest.”
“As long as the mind is enslaved, the body can never be free.”
“My mind changes often ... People who have no mind can easily be steadfast and firm, but when a man is loaded down to the guards with it, as I am, every heavy sea of foreboding or inclination, maybe of indolence, shifts the cargo.”