You may lead a horse to water but you can't make him drink.
You may poke a man's fire after you've known him for seven years.
You must not expect old heads upon young shoulders.
You never know what you've got till it's gone.
You only get what you give.
You pays your money and you takes your choice.
You reap what you sow.
You scratch my back and I'll scratch yours.
You don't dip your pen in the company's ink.
You snooze you lose.
You don't dip your pen in the inkwell.
You're never too old to learn.
You don't need a weatherman to know which way the wind blows.
Youth is wasted on the young.
You get more with a kind word and a gun than you do with a kind word alone.
Youth will be served.
You get what you pay for.
You've got to be in it to win it.
You have to take the good with the bad.
You've got to crack a few eggs to make an omelette.
You made your bed, now lie in it.
Zeal without knowledge is a runaway horse.
You make the bed you lie in.
Waste not, want not.
What is done cannot be undone.