In this epistle the Apostle John's focus is on the strengthening of fellowship of believers with God and with one another. Verse 5 states that "God is light" - this points to his total perfection infinitely. Thus his people must reflect his nature and strive to conform to his image, though the reality is we still sin. Three times, in verses 6,8, and 10, John writes, "if we say," thus pointing to some erroneous concepts regarding sin: 1) Those who walk in darkness are not in fellowship with God or the brethren. On the contrary, we must walk in the Light, which brings us into Christian fellowship, and such walking also brings us cleansing from sin through Jesus' blood. 2) Those who deny that they are sinful are self-deceived. They must instead confess their sin to receive forgiveness. 3) Those who deny they have committed acts of sin make God a liar and do not possess the indwelling of the Word of God. Jesus Christ himself is the standard for Christian living and behavior, and we must strive to be like him. Though Christian people have not reached perfection, their solemn calling by the grace of God is to be like the Lord Jesus as much as possible.