Jesus is the Truth!

"1Beloved, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world. 2By this you know the Spirit of God: every spirit that confesses that Jesus Christ(Christ meaning the messiah) has come in the flesh is from God; 3and every spirit that does not confess Jesus is not from God; this is the spirit of the antichrist, of which you have heard that it is coming, and now it is already in the world. 4You are from God, little children, and have overcome them; because greater is He who is in you than he who is in the world." 1 John 4:1-4

Is it wrong to test whether God is the one speaking to you or not? of course not infact He tells us to in His word. Many false prophets have gone out into the world. They believe in a lie and you can know them by this great section of 1 John.
But also there are those who would try to pervert the knowledge of Christ Jesus about them we have instruction found in Galatians 1:6-8 "6 I am amazed that you are so quickly deserting Him who called you by the grace of Christ, for a different gospel; 7which is really not another; only there are some who are disturbing you and want to distort the gospel of Christ. 8But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed!" A strong warning to those religions who use the name of Christ Jesus falsely. One more way to know those who are from Him is spoken by Jesus in Matthew 7:15-2015"Watch out for false prophets. They come to you in sheep's clothing, but inwardly they are ferocious wolves. 16By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? 17Likewise every good tree bears good fruit, but a bad tree bears bad fruit. 18A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. 19Every tree that does not bear good fruit is cut down and thrown into the fire. 20Thus, by their fruit you will recognize them."

Well hope this helps in decerning some of the lies out there from the enemy.