The best collection of material that I have found on the Doctrine of Deification, which was lost during the Great Apostasy and restored by Joseph Smith, can be found on Hannah Rebekah's blog about Deification.
If you want the purpose of life to be restored to you, then I highly recommend that you look into this topic.
Ask yourself, "Why are we here on this earth? What's it all about?"
"Where are we going after we die?"
"Are the atheists right? Do we simply cease to exist after we die? Or, is there more to come? Is there some part of us that is immortal and eternal that goes on after we die?"
"What did Christ's Apostles and the Ante-Nicene Fathers believe and preach?"
"What did Jesus Christ restore to the earth through Joseph Smith?"
These questions and a lot more are covered in Hannah Rebekah's blogs, in a thoughtful and comprehensive manner.