All his life he lived simply and kept to his principles, never chasing fame or money.
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道 here is the Way, the moral path of the Confucian classics, not 'to say', and 乐 is 'to delight in', read lè, not yuè. The model is 颜回, the disciple who lived on a bowl of rice and a gourd of water and, in Confucius's words, never lost his joy.