There is a doctor of divinity here tonight who listened to me some years ago. He has been back to his dwelling-place in America, and he has come here again. I could not help fancying, as I saw his face just now, that he would think I was doting on the old subject and harping on the old strain, that I had not advanced a single inch upon any new domain of thought, but was preaching the same old gospel in the same old terms as ever. If he should think so, he will be quite right. I suppose I am something like Mr. Cecil when he was a boy. His father once told him to wait in a gateway till he came back; and the father, being very busy, went about the city; and amidst his numerous cares and engagements, he forgot the boy. Night came on, and at last when the father reached home, there was a great inquiry as to where Richard was. The father said, "Dear me, I left him early in the morning standing under such-and such gateway, and I told him to stay there until I came for him; I should not wonder but what he is there now." So they went, and there they found him. Such an example of childish, simple faithfulness it is no disgrace to emulate. I received some years ago orders from my Master to stand at the foot of the cross until He came. He has not come yet, but I mean to stand there till He does. IF I SHOULD DISOBEY HIS ORDERS AND LEAVE THOSE SIMPLE TRUTHS WHICH HAVE BEEN THE MEANS OF THE CONVERSION OF SOULS, I KNOW NOT HOW I COULD EXPECT HIS BLESSING. Here, then, I stand at the foot of the cross and tell out the old, old story, stale through it sound to itching ears, and worn threadbare as critics may deem it. It is of Christ I love to speak--of Christ who loved and lived and died the substitute for sinners, the just for the unjust, that He might bring us to God. It is somewhat singular, but just as they say fish go bad at the head first, so modern divines generally go bad first upon the head and main doctrine of the substitutionary work of Christ. Nearly all our modern errors, I might say all of them, begin with mistakes about Christ.