Contradictory Aphorism and Biblical Texts

What realm of human endeavour is not morally ambiguous? Even folk institutions that purport to give us advice on behaviour and ethics seem fraught with contradictions. Consider aphorisms - haste makes waste; yes, but a stitch in time saves nine. Better safe than sorry; but nothing ventured, nothing gained. Where there's smoke, there's fire; but you can't tell a book by its cover. A penny saved is a penny earned; but you can't take it with you. He who hesitates is lost; but fools rush in where...