A truly wise person often appears foolish or unassuming, not flaunting their intelligence.
他虽然平时不爱说话，看起来有点木讷，但关键时刻总能提出独到见解，真是大智如愚啊。
Although he usually doesn't talk much and seems a bit dull, he always offers unique insights at critical moments; truly, great wisdom appears as foolishness.
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