Literal meaning
hold (持) — it (之) — with (以) — persistence (恒)
Origin
A four-character crystallisation of the Confucian concept of 恒心 (steady intention) discussed in Mencius (《孟子·梁惠王上》): 无恒产而有恒心者，惟士为能 — "Only a true gentleman can keep a steady heart without secure property." The phrase 持之以恒 itself appears widely in late-imperial writing about moral cultivation and learning. Its modern usage is broader and more practical: keep at any habit long enough for it to actually work.
Examples
Usage & nuances
Most common everyday idiom for "keep at it." Reads naturally in spoken Mandarin and equally well in writing. The noun phrase 持之以恒的精神 ("the spirit of persistence") is a standard collocation.
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