To conquer oneself is the best and noblest victory; to be vanquished by one's own nature is the worst and most ignoble defeat.

But at three, four, five, and even six years the childish nature will require sports; now is the time to get rid of self-will in him, punishing him, but not so as to disgrace him.

'But the man who is ready to taste every form of knowledge, is glad to learn and never satisfied - he's the man who deserves to be called a philosopher, isn't he?'

The first and the best victory is to conquer self.

Knowledge is true opinion.

The one who learns and learns and doesn't practice is like the one who plows and plows and never plants.

You need some knowledge to recognize knowledge, so where does the first knowledge come from?