People who are growing with God all share one common trait, they attract criticism. Criticism is a compliment when you doing what you know you're supposed to do. I once read a cover story on Billy Graham in time magazine and I was surprised to find in that article several criticisms of him from fellow ministers. Then I was reminded of this fact, all great people get great criticism. So learn to accept and expect that you will receive unjust criticisms for your God-given goals and accomplishments.
It can be beneficial to receive constructive criticism from those who have your best interest at heart, but you are not responsible to respond to those who don't. No wonder Edward Gibbon said, "I never make mistake of arguing with people for whose opinions I have no respect".
It's a thousand times easier to criticize than create. That's why critics are never problem solvers. My feelings is that the person who says it cannot be done, should not interrupt the one who is doing it.
Don't waste time responding to your critics, because you own nothing to a critics, just remember when you are kicked from behind, it means you are out in front.