A rotten apple
spoils the barrel.
A dishonest or immoral person can have a bad influence on a
group.
Fine words butter no parsnips.
No amount of talking can
replace action.
It's no use crying over spilt milk.
Don't express regret for something that
has happened and cannot be remedied.
One man's meat is another man's
poison. People don't always
like the same things.
Too many cooks spoil the broth.
If too many people are involved in
something, it will not be done properly.
You are what you
eat.
The notion that to be fit and healthy you need to eat
good food.