人無遠慮,必有近憂 [ㄖㄣˊ ㄨˊ ㄩㄢˇ ㄌㄩˋ , ㄅㄧˋ ㄧㄡˇ ㄐㄧㄣˋ ㄧㄡ; ren2 wu2 yuan3 lu:4 , bi4 you3 jin4 you1]
He who gives no thought to far-flung problems soon finds suffering nearby (idiom, from Analects).
Smug concentration on the here and now will lead to future sorrow.
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