What passes flows on like this - never ceasing day or night.
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From 《论语·子罕》 (Analects). Confucius, standing by a river, said: 逝者如斯夫,不舍昼夜 - 'What passes is like this, never ceasing day or night.' One of the most famous meditations on time in world philosophy; inspired over a thousand years of 'river of time' poetry in Chinese.
usage
夫 (fú) here is the classical exclamatory particle - not 'husband' (fū). 斯 (sī) = 'this', pointing to the flowing water before Confucius. Always quoted with 不舍昼夜.