light of christ

D&C 88 6-13 talked about what is the light of christ.
and 11-13 especially talked about the holy ghost.
The holy ghost is given to every man and to guide us,
it's the guidiance of the light of truth, or spirit of christ.
if we listen to the spirit, we will be led to the th kingdom of God.

one more important thing is that,
i persoanlly think the spirit can help us to distinguish what is good or evil,
but first of all we need to be worthy that holy ghost will accompany us,
that we may be guided and protected.