Turning back is the shore (it's never too late to repent).
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culture
回头是岸 (turning back is the shore) is a Buddhist proverb meaning it's never too late to mend your ways. The full version is 苦海无边，回头是岸 - the sea of suffering is boundless, but turn back and the shore is there.
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The 'later / afterwards' sense is colloquial and points to a vague near future, as in casual promises to do something soon. It is separate from the literal 'turn one's head' meaning.
