Christianity substitutes obedience to a person, for that of obedience to a law. In legal obedience, a person fulfills a contract which he has undertaken. Christian obedience is like that of a slave to his master whom he loves. He does what he is told, without a will of his own. If I bid my child do three things, and he does only two of them which he likes to do and takes his own way in the third, insubjection of will is as much evidenced by his disobeying in one point, as if he had in all.
Christ's obedience was perfect. Every trial He was put through only manifested that in Him is no sin. In the garden of Gethsemane He chose rather to have God's face hidden than to fail to obey. He became obedient unto death, even the death of the cross. There is nothing so humble or so unselfish as obedience. It supposes that we have no will of our own.