An excerpt from "The Gospel Coalition.org" entitled, "The Sovereignty of God" by John M. Frame, states: "It is because God is the sovereign Lord that we must obey him (Deut. 6:4–6; John 14:21; Matt. 7:21–22; Luke 6:46). Because he is Lord, his authority is absolute. That means (1) we should not waver in our obedience to him (Rom. 4:16–22), (2) his lordship transcends all our other loyalties (Matt. 10:34–38), and (3) that his authority over us exists in all areas of human life, not just in the areas that we arbitrarily call religious or sacred (1 Cor. 10:31; cf. Col. 3:17, 24; 2 Cor. 10:5)." This article may be viewed at: The Sovereignty of God/thegospelcoalition.org
Reference: Romans 9:21