What motivates our Obedience?

In Luke 4 Jesus was lead into the wilderness where He was tempted 3 times and three times he resisted by quoting Scripture. One thing that strikes me is that the Son's love for the Father was manifest through his resistance of temptation to act in ways contrary to the Father's words (Jesus quoted the Old Testament--predominately Deuteronomy as grounds for resisting Satan). Jesus obeyed out of devotion, not duty; out of love, not legalism. May our love for the Father grow to the point that our obedience is driven by true devotion as well.