Your Guess Is as Good as Mine
You can’t fit a round peg in a square hole.
Your guess is as good as mine
You can lead a horse to water but you can’t make it drink.
You can’t take it with you
Your name is mud
You can catch more flies with honey than with vinegar.
You can’t win them all.
You show me the man and I’ll show you the rule.
You can’t teach an old dog new tricks.