Did God Ascend?

Does the Book of Mormon teach that God was once conceived by a heavenly father and mother?  Does it teach that God started as a spirit being, came to earth and took on human flesh, and then ascended into godhood?  Moroni 7:23 states, "For behold, God knowing all things, being from everlasting to everlasting, behold, he sent angels to minister unto the children of men,..."  To say that God is from "everlasting to everlasting" means that God did not have to be conceived because He has always existed.  Saying that God knows all things means that He does not need to learn.  He already knows all things.  He does not need to acquire more knowledge.  He is omniscient (infinite knowledge).  Moroni 8:18 says, "For I know that God is not a partial God, neither a changeable being; but he is unchangeable from all eternity to all eternity."  Some people believe that God has had an unchanging purpose.  This verse says that He is an unchangeable being.  He has always been God in the past and will always be God in the future.  According to the Book of Mormon, God did not have to start as a spririt being.  He did not have to take on a human body to ascend into godhood.  The Book of Mormon says that God was always God. 
     However, the Book of Mormon does mention someone trying to ascend into godhood.  2 Nephi 23:12-15 states, "How art thou fallen from heaven, O Lucifer, son of the morning!  Art thou cut down to the ground, which did weaken the nations!  For thou hast said in thy heart:  I will ascend into heaven, I will exalt my throne above the stars of God;  I will sit also upon the mount of the congregation, in the sides of the north:  I will ascend above the heights of the clouds; I will be like the Most High.  Yet thou shalt be brought down to hell, to the sides of the pit."  I think this is a message for those who want to ascend into godhood.  If you are trying to become a god, your destiny is not going to be in heaven.  It will be in a hotter place.