Behold, the Spirit of Christ
is given to every man,
that he may know good from evil;
wherefore, I show unto you the way to judge;
for every thing which inviteth to do good,
and to persuade to believe in Christ,
is sent forth by the power and gift of Christ;
wherefore ye may know
with a perfect knowledge it is of God.
But whatsoever thing
persuadeth men to do evil,
and believe not in Christ, and deny him,
and serve not God,
then ye may know with a perfect knowledge
it is of the devil;
for after this manner doth the devil work,
for he persuadeth no man to do good,
no, not one; neither do his angels;
neither do they
who subject themselves unto him.
And now, my brethren, seeing that
ye know the light by which ye may judge,
which light is the light of Christ,
see that ye do not judge wrongfully;
for with that same judgment which ye judge
ye shall also be judged.
Wherefore,
I beseech of you, brethren, that ye should
search diligently in the light of Christ
that ye may know good from evil;
and if ye will lay hold upon every good thing,
and condemn it not,
ye certainly will be a child of Christ.
(Moroni 7:16-19)