James 5:19-20; NKJV
19 Brethren, if anyone among you wanders from the truth, and someone turns him back,
20 let him know that he who turns a sinner from the error of his way will save a soul from death and cover a multitude of sins.
There is truth. Absolute truth. A standard of right and wrong. We can wander from it. When we do we are in danger of sin and death.
When you turn someone back who is wandering from the truth you participate in their salvation.
Know the truth. Abide in it. Encourage others to turn back when they wander.
