"Self-conquest is the greatest of victories."

"Not only is the old man twice a child, but also the man who is drunk."

"No knowledge considers or prescribes for the advantage of the stronger, but for that of the weaker, which it rules."

"You know that the beginning is the most important part of any work, especially in the case of a young and tender thing; for that is the time at which the character is being formed and the desired impression is more readily taken. Shall we just carelessly allow children to hear any casual tales which may be devised by casual persons, and to receive into their minds ideas for the most part the very opposite of those which we should wish them to have when they are grown up?"

"Music gives a soul to the universe, wings to the mind, flight to the imagination, a charm to sadness, gaiety and life to everything. It is the essence of order, and leads to all that is god, just, and beautiful, of which it is the invisible, but never less, dazzling, passionate, and eternal form."

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

"Necessity is the mother of invention."

"A life without investigation is not worth living."

"Love is simply the name for the desire and pursuit of the whole."

"This feeling of wonder shows that you are a philosopher, since wonder is the only beginning of philosophy."