But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.
and the blood of Jesus Christ his Son cleanseth us from all sin: Please note that John begins this verse with the conditional "if." If we walk in the light of holy living, certain blessings will be our portion. First, we enjoy a fellowship with God and a consequent fellowship with those of like precious faith. Second, we have the assurance that the blood of Christ is constantly cleansing us of those inadvertent sins that plague every Christian’s life. "Cleanseth" is another verb in the present tense that speaks of continuous action in this context. If we keep on walking habitually in the light of holy living as the general direction of our lives, the blood of Christ will keep on continually cleansing us of "all sin." Woods remarks: