What did that poor heathen man know about the Lord Jesus Christ? Next to nothing. How could he believe upon Him if he knew so little about Him? Well, you hear in the context that this summary answer to the question was the beginning, and not the end, of a conversation, which conversation, no doubt, consisted largely in extending and explaining the brief formulary with which it had commenced. But it is a grand thing that we can put the all-essential truth into half a dozen simple words, and then expound and explain them as may be necessary. And I come to you now, dear brethren, with nothing newer or more wonderful, or more out of the ordinary way than the old threadbare message which men have been preaching for nineteen hundred years, and have not exhausted, and which some of you have heard for a lifetime, and have never practised, 'Believe on the Lord Jesus Christ.'
Now I am not going to weary you with mere dissertations upon the significance of these words. But let me single out two points about them, which perhaps though they may be perfectly familiar to you, may come to you with fresh force from my lips now.
Mark, first, whom it is that we are to believe on. '_The Lord_,' that is the divine Name; '_Jesus_,' that is the name of a Man; '_Christ_,' that is the name of an office. And if you put them all together, they come to this, that He on whom we sinful men may put our sole trust and hope for our healing and our safety, is the Son of God, who came down upon earth to live our life and to die our death that He might bear on Himself our sins, and fulfil all which ancient prophecy and symbol had proclaimed as needful, and therefore certain to be done, for men. It is not a starved half-Saviour whose name is only Jesus, and neither Lord nor Christ, faith in whom will save you. You must grasp the whole revelation of His nature and His power if from Him there is to flow the life that you need.
And note what it is that we are to exercise towards Jesus Christ. To 'believe on Him' is a very different thing from _believing Him_. You may accept all that I have been saying about who and what He is, and be as far away from the faith that saves a soul as if you had never hoard His name. To believe on the Lord Jesus Christ is to lean the whole weight of yourselves upon Him. What do you do when you trust a man who promises you any small gift or advantage? What do you do when dear ones say, 'Rest on my love'? You simply trust them. And the very same exercise of heart and mind which is the blessed cement that holds human society together, and the power that sheds peace and grace over friendships and love, is the power which, directed to Jesus Christ, brings all His saving might into exercise in our lives. Brethren, trust Him, trust Him as Lord, trust Him as Jesus, trust Him as Christ. Learn your sickness, learn your danger; and be sure of your Healer and rejoice in your security. 'Believe on the Lord Jesus Christ, and thou shalt be saved.'
III. Lastly, consider the blessing we may all receive. This jailer about whom we have been speaking was a heathen when the sun set and a Christian when it rose. On the one day he was groping in darkness, a worshipper of idols, without hope in the future, and ready in desperation to plunge himself into the darkness beyond, when he thought his prisoners had fled. In an hour or two 'he rejoiced, believing in God with all his house.'
A sudden conversion, you say, and sudden conversions are always suspicious. I am not so sure about that; they may be, or they may not be, according to circumstances. I know very well that it is not fashionable now to preach the possibility or the probability of men turning all at once from darkness to light, and that people shrug their shoulders at the old theory of sudden conversions. I think, so much the worse. There are a great many things in this world that have to be done suddenly if they are ever to be done at all. And I, for my part, would have far more hope for a man who, in one leap, sprung from the depth of the degradation of that coarse jailer into the light and joy of the Christian life, than for a man who tried to get to it by slow steps. You have to do everything in this world worth doing by a sudden resolution, however long the preparation may have been which led up to the resolution. The act of resolving is always the act of an instant. And when men are plunged in darkness and profligacy, as are, perhaps, some of my hearers now, there is far more chance of their casting off their evil by a sudden jerk than of their unwinding the snake by slow degrees from their arms. There is no reason whatever why the soundest and solidest and most lasting transformation of character should not begin in a moment's resolve.