The obedience of Christ would not have been as perfect if He had not been God. Where duty exists, it is the expression and test of love; and where would have been the fullness and inward perfectness of obedience, its motive, if He had not been God who is Love? So He says " That the world may know that I love the Father, and as the Father hath given me commandment, so I do." But it was the expression of infinite Love, and so was perfect.