Matthew Henry shares in his commentary on Esther chapter 4: "We should Every one of us consider for what end God has put us in the place where we are, and study to answer that end; and, when any particular opportunity of serving God and our Generation offers itself, we must take care that we do not let it slip for we were entrusted with it that we might improve it."
Learn some background on Esther from the Bible and how she was challenged to do something that seemed impossible. Examine your own calling and what you thing might be holding you back from stepping into it.