Truth or Not

So as a missionary i ask a lot of people to ask God about the truth of the message we share with them.  Moroni in the Book of Mormon says
Moroni 10:3-5
3 Behold, I would exhort you that when ye shall read these things, if it be wisdom in God that ye should read them, that ye would remember how ^amerciful the Lord hath been unto the children of men, from the creation of Adam even down until the time that ye shall receive these things, and ^bponder it in your ^chearts.

 4 And when ye shall receive these things, I would exhort you that ye would ^aask God, the Eternal Father, in the name of Christ, if these things are not ^btrue; and if ye shall ask with a ^csincere heart, with ^dreal intent, having ^efaith in Christ, he will ^fmanifest the ^gtruth of it unto you, by the power of the Holy Ghost.

 5 And by the power of the Holy Ghost ye may ^aknow the ^btruth of all things.

And in the Bible James directs us

James 1:5-6

5^aIf any of you lack ^bwisdom, let him ask of God, that ^cgiveth to all men liberally, and ^dupbraideth not; and it shall be given him.

 6But let him ^aask in ^bfaith, nothing ^cwavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

How can we know if something is of God or not that's easy,

1. Does it conicide with what God has taught in the past.

2. Does it lead one to doing good.

3. Ask God (He knows all the anwsers)

There are many other ways to know but it wall comes to asking God The Eternal Father.  And as Moroni and James tell us we will get our anwser. 

No matter the question no matter the situation If we ask God and go with the intent of following what he tells us then he will give us our anwser.

http://mormon.org/book-of-mormon/