you can't teach an old dog new tricks

== English == === Etymology === A form of (obsolete) “An old dog will learn no tricks”. === Pronunciation === === Proverb === you can't teach an old dog new tricks It is impossible to change people's habits, traits, or mindset. ==== Antonyms ==== it's never too late to mend you're never too old to learn ==== Translations ==== === See also === a leopard cannot change his spots old habits die hard there's life in the old dog yet you can't put an old head on young shoulders === References ===