We are all children of earthly parents. We resemble them in many ways, both physically and temperamentally. People can look at us and see that we are our parents' child because we share similar features and modes of living. This was true of Jesus and His relationship with God the Father. When we believe this is true, we become children of God too. As children of God we are called to resemble Him in our mode of living, so much so that people can look at us and see that we are, in fact, children of God.