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Confucius said, “The noble person has three things to guard against: in youth, when one’s vital energies (xue qi) are not yet settled, guard against lust; in prime adulthood, when vital energies are at their strongest and most vigorous, guard against contentiousness; in old age, when vital energies have declined, guard against greed.”
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The Master said, “At fifteen I set my heart upon learning. At thirty, l had planted my feet firm upon the ground. At forty, I no longer suffered from perplexities. At fifty, I knew what were the biddings of Heaven. At sixty, I heard them with docile ear. At seventy, I could follow the…