The Blessing of Full Assurance

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1 John 5:13

These things have I written to you that believe on the name of the Son of God; that you may know that you have eternal life…

I. JOHN WROTE WITH A SPECIAL PURPOSE.

1. To begin with, John wrote that we might enjoy the full assurance of our salvation. Full assurance is not essential to salvation, but it is essential to satisfaction. May you get it — may you get it at once; at any rate, may you never be satisfied to live without it. You may have full assurance. You may have it without personal revelations; it is wrought in us by the word of God. He begins thus: "Whosoever believeth that Jesus is the Christ is born of God." Can anything be more clear than this? The loving spirit of John leads him to say, "Everyone that loveth Him that begat, loveth Him also that is begotten of Him." Do you love God? Do you love His only-begotten Son? You can answer those two questions surely. John goes on to give another evidence: "By this we know that we love the children of God, when we love God, and keep His commandments." You can tell whether you love the brethren, as such, for their Master's sake, and for the truth's sake that is in them; and if you can truly say that you thus love them, then you may know that you have eternal life. Our apostle gives us this further evidence: "This is the love of God, that we keep His commandments; and His commandments are not grievous." Obedience is the grand test of love. By the fruit you can test the root and the sap. But note that this obedience must be cheerful and willing. "His commandments are not grievous." I said to one who came to join the Church the other day, "I suppose you are not perfect?" and the reply was, "No, sir, I wish I might be." I said, "And suppose you were?" "Oh, then," she said, "that would be heaven to me." So it would be to me. We delight in the law of God after the inward man. Oh, that we could perfectly obey in thought, and word, and deed! John then proceeds to mention three witnesses. Do you know anything about these three witnesses? Do you know "the Spirit"? Has the Spirit of God quickened you, changed you, illuminated you, sanctified you? Next, do you know "the water," the purifying power of the death of Christ? Do you also know "the blood"? Do you know the power of the blood to take away sin? Then in the mouth of these three witnesses shall the fact of your having eternal life be fully established. One thing more I would notice. Read the ninth verse: the apostle puts our faith and assurance on the ground that we receive "the witness of God." The inmost heart of Christian faith is that we take God at His Word; and we must accept that Word, not because of the probabilities of its statements, nor because of the confirmatory evidence of science and philosophy, but simply and alone because the Lord has spoken it.

2. Furthermore, John wrote that we might know our spiritual life to be eternal. We are said to be "made partakers of the Divine nature." Immortality is of the essence of the life of God. If our life is Christ's life, we shall not die until Christ dies. Let us rest in this.

3. Once more, John desired the increase and confirmation of their faith. "That ye might believe on the name of the Son of God." Many a Christian man is narrow in the range of his faith from ignorance of the Lord's mind. Like certain tribes of Israel, they have conquered a scanty territory as yet, though all the land is theirs from Dan to Beersheba. John would have us push out our fences, and increase the enclosure of our faith. Let us believe all that God has revealed, for every truth is precious and practically useful. It will be well for you if your faith also increases intensively. Oh that you may more fully believe what you do believe! We need deeper insight and firmer conviction. This is John's desire for you, that you believe with all your heart, and soul, and strength. He would have you believe more constantly, so that you may say, "My heart is fixed, O God, my heart is fixed; I will sing and give praise." He would have us trust courageously. Some can believe in a small way about small things. Oh, for a boundless trust in the infinite God! We need more of a venturesome faith; the faith to do and dare. We need also to have our faith increased in the sense of its becoming more practical. We want an everyday faith, not to look at, but to use. God give to you that you may believe on the name of the Son of God with a sound, common sense faith, which will be found wearable, and washable, and workable throughout life. We need to believe more joyfully. Oh, what a blessed thing it is when you reach the rest and joy of faith! If we would truly believe the promise of God, and rest in the Lord's certain fulfilment of it, we might be as happy as the angels.

II. THE PURPOSE WHICH JOHN HAD IN HIS MIND WE OUGHT TO FOLLOW UP. If he wished us to know that we have eternal life, let us try to know it. The Word of God was written for this purpose; let us use it for its proper end. Our conscience tells us that we ought to seek full assurance of salvation. It cannot be right for us to be children of God, and not to know our own Father. Are you not bidden to make your calling and election sure? Are you not a thousand times over exhorted to rejoice in the Lord, and to give thanks continually? But how can you rejoice, if the dark suspicion haunts you, that perhaps, after all, you have not the life of God?

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