If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth. John introduces the first of several conditional statements testing claims to know God. "If we say" addresses professions of faith that may be false. The contrast is stark: claiming fellowship with God (who is light) while "walking in darkness" is an impossibility—to claim otherwise is to lie.
"Walk" (peripatōmen, περιπατῶμεν) indicates lifestyle and habitual practice, not occasional stumbling. The present tense emphasizes ongoing conduct. Darkness represents sin, error, and moral blindness. "We lie" (pseudometha, ψευδόμεθα) is straightforward—false profession of faith while living in sin is deception.
"Do not the truth" is a Hebraic expression meaning to practice truth, to live according to reality. This verse demolishes antinomianism and exposes mere profession without transformation. Genuine fellowship with God produces changed life—not perfection, but fundamental redirection from darkness to light.
Historical Context
The Gnostic teachers claimed superior spiritual knowledge and fellowship with God while living immorally. They divorced spiritual status from ethical behavior, arguing that the spirit's enlightenment was unaffected by the body's actions. Some practiced strict asceticism, others libertinism—but both denied that moral conduct evidenced true knowledge of God.
This heresy persists throughout church history. Medieval indulgences suggested salvation could be purchased regardless of lifestyle. Antinomian movements claimed grace made obedience irrelevant. Modern "easy believism" sometimes presents salvation as mental assent without life transformation.
John's test is simple and devastating: those who walk in darkness, regardless of their claims, do not have fellowship with the God who is light.
Questions for Reflection
Are there areas of your life where you're claiming fellowship with God while walking in darkness?
How can you distinguish between struggling against sin and walking in darkness?
What would it look like for your church to lovingly but firmly apply this test of genuine faith?
Related Resources
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Analysis & Commentary
If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth. John introduces the first of several conditional statements testing claims to know God. "If we say" addresses professions of faith that may be false. The contrast is stark: claiming fellowship with God (who is light) while "walking in darkness" is an impossibility—to claim otherwise is to lie.
"Walk" (peripatōmen, περιπατῶμεν) indicates lifestyle and habitual practice, not occasional stumbling. The present tense emphasizes ongoing conduct. Darkness represents sin, error, and moral blindness. "We lie" (pseudometha, ψευδόμεθα) is straightforward—false profession of faith while living in sin is deception.
"Do not the truth" is a Hebraic expression meaning to practice truth, to live according to reality. This verse demolishes antinomianism and exposes mere profession without transformation. Genuine fellowship with God produces changed life—not perfection, but fundamental redirection from darkness to light.