We can say, God died upon the cross of Calvary, because the Person who died was God. Remembering that sin is a personal term, to say that Christ could sin would be the same as saying that God could sin, which is not only contrary to express Scripture statements, but is a denial of our very conception of God. And Christ's human nature could not sin, because it is only a person that can sin and Christ's human nature was under the absolute control of His person. The objection is sometimes raised to this doctrine of the impeccability of Christ, that His temptation was a farce, and that it affords no reason whereby we may account for His manifest agony under the temptations that He endured. But this objection rests under a false notion of temptation and also fails to take into account the humiliation of Christ.
Temptation means to try, to test, to prove.
Because we poor sinners with our corrupt natures so readily fall into sin and succumb to the temptation that is addressed to us, we naturally associate with temptation the possibility of a fall. But where the Person concerned is not a mere human person, but the eternal and almighty God, manifestly no such possibility exists. Even the angels in heaven, who have been confirmed in their holiness cannot sin. Much less dare we say that the Son of God Incarnate could sin. And the agony of the temptation in Christ's case should not be conceived of as due to the idea that He was fearful that He might possibly be overcome and fall.