Consider this situation:

Person #1 resides on the light side (of good).
Person #2 temporarily abides on the dark side (of evil).

Person #2 seeks to exploit Person #1’s kindness for selfish ends, to commit evil. Person #1 must discern these intentions. Do not be naive: mindless good may enable Person #2 to fulfill their planned evil…

Then Person #1 must exert effort (within their means) to help Person #2 realize:
a) Their temporary existence on the dark side.
b) The necessity to grow brighter and kinder by returning to the side of good.

P.S. (1) A time will come when all people stand on the light side, and peace, unity, balance, and harmony shall reign.
P.S. (2) Natural-intelligent truths…