Harmony sinks deep into the recesses of the soul and takes its strongest hold there, bringing grace also to the body & mind as well. Music is a moral law. It gives a soul to the universe, wings to the mind, flight to the imagination, a charm to sadness, and life to everything. It is the essence of order.
PlatoShall we not, then, lay down a law, in the first place, that boys shall abstain altogether from wine till their eighteenth year, thereby teaching that it is wrong to add fire to fire, as through a funnel, pouring it into their body and soul before they proceed to the labor of life, thus exercising a caution as to the maddening habits of youth.
PlatoBecause, unlike courage and wisdom, which made our state brave and wise by being present in a particular part of it, discipline operates by being diffused throughout the whole of it. It produces a concord between its strongest and weakest and middle elements, whether you define them by the standard of good sense, or of strength, or of numbers or money or the like. And so we are quite justified in regarding discipline as this sort of natural harmony and agreement between higher and lower about which of them is to rule in state and individual.
Plato