Though he's young, he has the bold, ox-swallowing vigor of a real doer.
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From 尸子 (Shizi, Warring States text): 虎豹之驹，未成文而有食牛之气 — 'tiger and leopard cubs, before their markings come in, already have the spirit to devour an ox.' The phrase praises youthful boldness and raw ambition.
