The Proof of the Pudding Is in the Eating
(the only way to judge something is to try it)
Hey Pete. How come you don't go out for the basketball team?
Oh, I don't know couch. I've never had any interest in sports.
But you'd be a natural. I've been observing you in gym class. You're fast and well coordinated and you have good height.
Yeah, but basketball isn't my thing.
At least, you could give it a try. What do you have to lose? The proof of the pudding is in the eating.
I never really thought about it. May be it would be fun.
Now you're talking. Give it a try, so you can find out if you really like it or not.
OK, couch. You talked me into it. I'll try out for the team if you agree to let me bow out if I decide I don't like it.
bow out ＝（おじぎして**）→引き下がる