You cannot teach an old dog new tricks

you can't teach an old dog new tricks

You cannot teach some new skill or behavior to someone who is set in their ways. Good luck getting Grandpa to start going to yoga with you. You can't teach an old dog new tricks.See also: dog, new, old, teach, trick

You cannot teach an old dog new tricks.

Prov. Someone who is used to doing things a certain way cannot change. (Usually not polite to say about the person you are talking to; you can say it about yourself or about a third person.) I've been away from school for fifteen years; I can't go back to college now. You can't teach an old dog new tricks. Kevin's doctor told him not to eat starchy food anymore, but Kevin still has potatoes with every meal. I guess you can't teach an old dog new tricks.See also: cannot, dog, new, old, teach, trick