"All things will be produced in superior quantity and quality, and with greater ease, when each man works at a single occupation, in accordance with his natural gifts, and at the right moment, without meddling with anything else."

"Human behavior flows from three main sources desire, emotion, and knowledge."

"Music then is simply the result of the effects of Love on rhythm and harmony."

"If a man says that it is right to give everyone his due, and therefore thinks within his own mind that injury is due from a just man to his enemies but kindness to his friends, he was not wise who said so, for he spoke not the truth, for in no case has it appeared to be just to injure any one."

"Justice, although it resembles a mirage, is really concerned with internal rather than external activity, with the true self and its business."

"All I really know is the extent of my own ignorance."

"If people despise money when young, but grow to love it more and more as they grow older and no longer devote themselves to excellence as the best guardian, the power of reasoned, educated speech, leaves them."

"Evil is more opposed to the good than to the no-good."

"Knowledge becomes evil if the aim be not virtuous."

"So when a man surrenders to the sound of music and lets its sweet, soft, mournful strains, which we have just described, be funneled into his soul through his ears, and gives up all his time to the glamorous moanings of song, the effect at first on his energy and initiative of mind, if he has any, is to soften it as iron is softened in a furnace, and made workable instead of hard and unworkable: but if he persists and does not break the enchantment, the next stage is that it melts and runs, till the spirit has quite run out of him and his mental sinews are cut.,."