Learning how you're wrong is one of the best ways to grow. As Yoda says, failure is the best teacher. But sometimes you aren't sure you have failed.

By finding out how you are wrong, you find out where you can improve, and therefore where you can grow. This means going out of your way to test your assumptions with conscientious people (not docile people).

The only way to do that, is by putting your ideas and thoughts into the world. Only then can you truly understand whether you are right, or whether you are wrong. Only then can you truly grow.