[116] And it is very admirably said that no one refused, by way of intimating a participation in perfect and complete courage; just as the lyre and any other musical instrument is out of tune, if there is one single discordant note in it; but is in tune when the strings are all harmonious and pour forth the same symphony at one touch. In the same manner also, the instrument of the soul is out of tune when it is either strained by rashness and urged on to a degree of exceeding sharpness, or relaxed by cowardice in an immoderate degree, so as to be let down and become very flat. But it is in tune when all the tones of courage and of every virtue are well united and combined together, and so produce one well-arranged melody.