Gather in the souls. Each soul is a light to burn brightly for Christ, the Chief and Source of Light. Fret not about the thickening darkness. No matter how tiny your light, no matter how overwhelming the darkness appears to grow, your light will be seen. Don’t run away from the world and hide like hermits. To the contrary, get out more and more into the world and let your light shine.
The easier it gets to get into sin, the more desperate people will become. The more desperate they become, the more they will want Christ. We Christians will be there to rescue them.