"Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything."
"Our object in the construction of the state is the greatest happiness of the whole, and not that of any one class."
"He who is of calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden."
"We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light."
"The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom."
"The direction in which education starts a man will determine his future in life."
"Love is a serious mental disease."
"Wise men speak because they have something to say; Fools because they have to say something."
"Entire ignorance is not so terrible or extreme an evil, and is far from being the greatest of all; too much cleverness and too much learning, accompanied with ill bringing-up, are far more fatal."
"Opinion is the medium between knowledge and ignorance."
"The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant."
"A good decision is based on knowledge and not on numbers."
"Knowledge without justice ought to be called cunning rather than wisdom."
"Knowledge is true opinion."
"Human behavior flows from three main sources: desire, emotion, and knowledge."
"Knowledge becomes evil if the aim be not virtuous."
"And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul."
"Knowledge which is acquired under compulsion obtains no hold on the mind."
"Love is the joy of the good, the wonder of the wise, the amazement of the Gods."
"At the touch of love everyone becomes a poet."
"Life must be lived as play."
"Thinking: the talking of the soul with itself."
"The beginning is the most important part of the work."
"There are two things a person should never be angry at, what they can help, and what they cannot."