When you find your path, you must not be afraid. You need to have sufficient courage to make mistakes. Disappointment, defeat, and despair are the tools God uses to show us the way.
Though it is possible to utter words only with the intention to fulfill the will of God, it is very difficult not to think about the impression which they will produce on men and not to form them accordingly. But deeds you can do quite unknown to men, only for God. And such deeds are the greatest joy that a man can experience.