“If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.” The Apostle John says in the preceding verse (vs. 5) that God is light. Therefore, those who walk in darkness are not walking with God, no matter what they say. John says that if you are walking in darkness then you are not practicing the truth. By contrast, those who walk in the light reflect God’s glory; they walk in the same way Jesus walked (vs. 2:6). The light in which they walk includes both correct doctrine (truth) and God’s moral law (holiness). If you “walk in the light” then you practice the truth and your behavior is consistent with your doctrine. When you live your life each day according to God’s redemptive love and moral law, then you are living the truth. You are like a practitioner of the truth, a truth professional. Just as doctors practice medicine and attorneys practice the law, Christians practice truth. As a practitioner of truth, when you “walk in the light” then your life is known to others: “You are the light of the world…let your light shine before others, so that they may see your good works and give glory to your Father who is in heaven” (Matthew 5:14-16). Be a truth professional and let the way you live your life and the way you say you live your life be one in the same and to the glory of God, and the blood of Jesus Christ will cleanse you from all sin.