# 威廉‧詹姆士的《心理學原理》(ThePrinciplesofPsychology)一書中,有這麼一段內容。某位退伍軍人雙手拿著食物在走路,旁邊一位男性開玩笑地說「立正!」沒想到那位退伍軍人立刻放開雙手,擺出立正姿勢,原本拿在手中的肉和馬鈴薯全部掉在地上。即使手裡拿著重要的食物,習慣的威力還是不容小覷啊。
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