God uses ordinary people to accomplish extraordinary things.
God can use us for HIS greater purpose. As soon as we allow God to begin to change the way we think about what we can do, we enable HIM to morph us into someone new. When we are transformed and then believe in ourselves, God will use us in amazing ways.
Romans 12:2
Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is, his good, pleasing and perfect will.
