The following is his whole quote.
I say to the whole world, receive the truth, no matter who presents it to you.
Take up the Bible, compare the religion of the Latter-day Saints with it, and see if it will stand the test. (Journal of Discourses, Vol. 16, p.46)
With this challenge in view I have a lot of questions but I will only focus on one question? Joseph Smith stated, "I am going to tell you how God came to be God. We have imagined and supposed that God was God from all eternity. I will refute that idea, and take away the veil, so that you may see. … It is the first principle of the Gospel to know for a certainty the character of God and to know...that he was once a man like us.... (“King Follett Discourse,” Journal of Discourses 6:3-4, emphasis added)
My question is why does Moroni 8:18 and D & C 20:17 refute what Smith stated? Moroni 8:18:
18 For I know that God is not a partial God, neither a changeable being; but he is unchangeable from all eternity to all eternity.
17 By these things we know that there is a God in heaven, who is infinite and eternal, from everlasting to everlasting the same unchangeable God, the framer of heaven and earth, and all things which are in them;
Since God is unchangeable and eternal according to LDS writings how do you reconcile this with Joseph Smith stating he "Will refute that idea and will take away the veil?"