So you see, there are two aspects of Christ's great work set before us under that one metaphor of the blood in its two-fold form, first, as shed for us sinners on the Cross; second, as poured into our veins day by day. That works progressive cleansing. It covers the whole ground of all possible iniquity. Pardon is much, purifying is more. The sacrifice on the Cross is the basis of everything, but that sacrifice does not exhaust what Christ does for us. He died for our sins, and lives for our sanctifying. He died for us, He lives in us. Because He died, we are forgiven; because He lives, we are made pure. Only remember John's 'if.' The 'blood of Jesus will progressively cleanse us until it has cleansed us from _all_ sin,' on condition that we 'walk in the light,' not otherwise. If the main direction of our lives is towards the light; if we seek, by aspiration and by effort, and by deliberate choice, to live in holiness, then, and not else, will the power of the life of Jesus Christ deliver us from the power of sin and death.
Now, my text presupposes that the people to whom it is addressed, and whom it concerns, have already passed from darkness into light, if not wholly, yet in germ. But for those who have not so passed, there is something to be said before my text. And John says it immediately; here it is, 'If any man sin we have an Advocate with the Father, Jesus Christ the righteous, and He is the propitiation for our sins; and not for our sins only, but for the whole world.' So we have to begin with the blood shed for us, the means of our pardon, and then we have the advance of the blood sprinkled on us, the means of our cleansing. If by humble faith we take the dying Lord for our Saviour, and the channel of our forgiveness, we shall have the pardon of our sins. If we listen to the voice that says, 'Ye were sometime darkness, but now are ye light in the Lord. Walk as children of the light,' we shall have fellowship with the living Lord, and daily know more and more of the power of His cleansing blood, making us 'meet to be partakers of the inheritance of the saints in light.'