The revelation of 1 John 1:5 presents us with a God whose essence is absolute light: "God is light; in him there is not the slightest trace of darkness." This means that the divine does not tolerate mixture with what is dark. The central idea you brought is biblical and urgent: we must abandon everything that draws us away from God, for light and darkness do not coexist.
The apostle warns that claiming fellowship with God while we walk in darkness is living in falsehood (1 John 1:6). Pastorally, this calls us to an honest self-examination: what practices, vices, complaints, or divided loyalties do we maintain that obscure our walk? It is not about legalistic condemnation, but about recognizing where there is separation so that grace can reach and transform.
Walking in the light is a practical and communal path: when we live "as He is in the light" we experience true fellowship and the blood of Jesus cleanses us from all sin (1 John 1:7). This implies sincere confession, repentance that cuts the roots of sin, concrete change of course — turning away from occasions of sin, seeking godly guidance — and nurturing spiritual life in the Word, prayer, and community life. Purification is the work of Christ; our role is to walk in the light that He is.
If today you feel the shadow of something that draws you away, know that the door of light is open through the blood of Jesus: confess, renounce, and walk with brothers and sisters who will sustain you on that path. God does not mix light with darkness, but He invites us to enter His light and gives us the power to abandon everything that separates us. Rise up now and walk in the light — fellowship and purification await you.