The best answer to this question I ever saw was written by forum member Kagin in a few different posts.
[The push] should be almost the perfect ball for you. (Maybe the perfect ball would be the one that your opponent hit into the net.) If your opponent wants to push, every option is available to you. If you've trained your footwork it's a third ball loop kill. If you're not there yet but have decent footwork and spin it's a spinny loop setting up for a smash. If you don't trust your topspin, push the ball back. What's the worst that can happen - your opponent loops your push? You're a chopper, that shouldn't be a problem. If they push again, you should have the advantage there too; a chopper shouldn't lose a pushing battle. You should have the advantage both technically and psychologically.
A typical psychological signal that a chopper sends is along the lines of:
I'm steadier than you, have better touch than you, and can chop back all of your loops. I'm patient and have both the fitness and willingness to return 50 balls on every point, and if you can last 50 balls I can last 51. My defense is strong yet if your attack or your push is too weak I'm ready to bring my forehand topspin into play, and I'm ready to test your defense if you prefer. Otherwise, I challenge you to find the weak spot in my defense, and even if you find it you'll have to work hard to use that advantage. I don't give away free points and I don't give up; I will eventually wear you down.
Hey, what a way with words! Love to hear more from him. Great way of thinking also for a developing attacker.