You can teach an old dog new tricks with the right kind of doggie treats.
It's not enough to be able to spell "magnificence" in your bedroom. You have to be able to spell it at the microphone during the spelling bee.
Ten minutes is short if it's a recess and long if it's a punishment.
It doesn't count if your swing is going the highest if you're getting pushed.
Nobody can pedal the bike for you.
The path you're on looks different when you turn around.