The more we compare John's gospel and epistle, the more we shall see the contrast of the instruction—life in Christ, light in the world, in the gospel; but Christ, life in the believer (in us) in the epistle. Hence darkness comprehended it not; darkness passing, the true light now shining. The life was manifested; we walk in the light as God is in it. The instruction is very great in this. In Him was life—light perfectly adapted to men—now, which thing is true in Him and in you, for the darkness is passed (passes or is passing) and the true light now shineth. We walk in it as God is in it.