How do you think I got here? _On the cars._ What drew the cars? _An engine._ Did you ever see an engine? _Yes, sir!_ (with emphasis). This summer, where I live, at Tarrytown, a gentleman said to me, "Don't you want to go down on the track and see the express train go by to-night?" I said yes: so we went. By-and-by I heard a rumble: it seemed to come nearer and nearer, and got louder and louder. What was coming? _The express train._ Yes, it was going to rush by us at thirty miles an hour. Could we have held out our hands and stopped it? _No, sir!_ (emphatically, and incredulously). Suppose we had had you to help us, could we then? _No, sir!_ Well, suppose all the people in this house had caught hold of the cars?--what then? _It would have pulled them to pieces!_ [a little girl says]. Well, in a minute or two I heard a sharp _toot! toot!_--what was that? _The whistle._ Yes, and the man on the engine put his hand on a little iron bar and pushed it, and the cars began to go slower and slower and slower until they stopped. The man put his hand on the right place, the place of power, the place that made the engine go or stop. Now, what does Jesus say to us? "Behold, I stand at the door and knock." Can you tell me at what door Jesus knocks? _Our hearts._ "If any man," or child, "will hear my voice, and open--_the door_--I will come in and--_sup with him_." Yes, "and he with me;" and we shall be saved. But there must be something on the door, or we cannot be saved, any more than the Jews, if they forgot, or would not, put the blood on the doors of their houses. What must we have on the door? _Blood_. Yes. Well, will it do if you cut your finger, and sprinkle the blood on your house? _No, sir._ Suppose you kill a little lamb, and put the blood on your front door, will that save you? _No, sir, no, sir!_ What must the blood be on? _Our hearts!_ Yes, the blood must be put upon the right place, the place where Jesus knocks, the place of power. Our hearts then are--_the door_. And what must be sprinkled on the door? _Blood._