When you see loved ones, friends or anyone stepping into dark places or getting lost in the darkness you can step in and be the light that guides them to a safe place.
Read: Philippians 2:15-16
so that you may prove yourselves to be blameless and guileless, innocent and uncontaminated, children of God without blemish in the midst of a [morally] crooked and [spiritually] perverted generation, among whom you are seen as bright lights [beacons shining out clearly] in the world [of darkness], 16 holding out and offering to everyone the word of life, so that in the day of Christ I will have reason to rejoice greatly because I did not run [my race] in vain nor labor without result.