Are you settling for a small vision for your life?

I'm reading "Living in the Gap Between Promise and Reality" right now. The book is about the life of Abraham and how Abraham points to the gospel. Early in the book, talking about how Abraham says to God "If only Ishmael might live under your blessing" (Gen. 17:18), the author points out that Abraham is trying to settle for a smaller vision for his life than the one God had for him (God didn't want to give Abraham a son by his wife's servant, he wanted countless descendants of his own, more than the stars in the sky). Then he gives the following quote:

"What about you? Are you settling for a vision that is too small in your life? Are you choosing the easy option because you don't really believe God can bring something great in your life? Yes, God sometimes calls us to be faithful in the little things, but is that really your calling, or are you afraid to hope for anything more? And what about your church? Do you expect to see God do great things there? Do you pray for God to do great things there, or are you content just to survive? All too often we don't really expect God to do anything dramatic, do we? It all seems to difficult to imagine. Yet we are part of an army with a great commission. We have received our marching orders to take the gospel to the ends of the earth: "God and make disciples of all nations" (Matt. 28:19). Along with these instructions comes the divine promise: "And surely I am with you always, to the very end of the age" (v. 20). If God is with us, then what task is impossible?"