Yóulì le duō guó zhīhòu, tā zhēn yǒu dēng Tài Shān ér xiǎo tiānxià de gǎnjué.
After traveling through many countries, he truly had the feeling of "climbing Mt. Tai and finding the world small".
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From 《孟子·尽心上》 (Mencius 7A.24): 孔子登东山而小鲁，登泰山而小天下 — 'Confucius climbed Mt. Dong and found Lu small; he climbed Mt. Tai and found all under heaven small.' Mencius's parable about how higher vantage points reshape one's sense of scale — used today as a metaphor for intellectual breadth.
usage
小 here is a causative verb in classical Chinese: 'to make X small / to perceive X as small' — not the ordinary adjective 'small'. Always cited together with 登东山而小鲁 in the original Mencius passage.
