Bodily exercise, when compulsory, does no harm to the body; but knowledge which is acquired under compulsion obtains no hold on the mind.Plato
“The first and best victory is to conquer self.”
Philosopher · 428 BCE – 348 BCE
Greek philosopher, student of Socrates and author of The Republic.
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The beginning is the most important part of the work.Plato

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A good decision is based on knowledge and not on numbers.Plato
Wise men talk because they have something to say; fools, because they have to say something.Plato
Good actions give strength to ourselves and inspire good actions in others.Plato

The first and greatest victory is to conquer yourself.Plato

Nothing whatsoever should be clung to as 'I' or 'mine'.Buddhadasa Bhikkhu