Here John interjects a statement lifted, as it were, from his gospel, 1:18, where he said, “No man hath seen God at any time; the only begotten Son which is in the bosom of the Father, He hath declared Him.”  There, the holy apostle was manifesting that, although we have not seen God with our naked eyes, we nevertheless see His perfect image and attributes, in the glorious splendor of His grace, in the person of Jesus Christ.  The fullness of the Godhead dwells in Him bodily, so that the Lord could declare with no exaggeration, “He that hath seen Me hath seen the Father.”  But here, John utilizes the fact that no man has seen God in the full majesty of His glorious essence to a different purpose.  The glory, kindness, and love of God, is seen, not in looking at the throne, for there God dwells in the light which no man can approach unto.  But the love and kindness of God is now manifested in the love which His people manifest one towards another.  When we love one another, His love is perfected in us, and the world cannot help but notice that we are showing forth the grace of our God.  What a tremendous obligation this places upon us, that we, sinful and frail though we are, should show forth the glory of the great God to a lost and dying world!