1 John 1:5–10: Walking in the Light
The message John announces is that God is light, and that message sorts people by how they walk, not by what they claim. Sinlessness is self-deception; confession rests on God's faithfulness and righteousness.
How to observe repeated words contrasts and structure in a passage: A Step-by-Step Guide
John states one message, then tests every claim of fellowship against how a person actually walks. The repeated words light, darkness, sin, and say give the passage its shape, and its aim is that readers may not sin.