The Bible says that God’s wisdom and knowledge has been given to everyone on earth (through all religions).
I have a belief which is probably unique to the Latter-day Saints. I believe in a literal Adam and Eve. I also believe that after their fall, the Lord taught them the whole story of the plan of salvation, the coming of Jesus Christ, the need for baptism, how mankind could be redeemed from the fall, the future resurrection of mankind, and the future suffering of Christ on the cross. God taught them to offer sacrifices and explained to them plainly that those sacrifices where a metaphor or symbol of the sacrifice that the Son of God would one day make. In essense, Adam and Eve knew the gospel of Jesus Christ and taught it to their children, who taught it to their children.
I remember sitting in a public High School class circa 1975 in California, and we were learning about Asian religions. I learned for the first time some basics of Buddhism, Taoism, Hinduism, and others. As I sat there and heard about Karma, reincarnation, nirvana, bottisatva, moral codes, and some other principles, some similarities to my beliefs were startling. That's not to say that I believe in Karma or reincarnation, etc., but I saw similarities. The idea of eternal progression struck me for example. The idea that one lives multiple lives in a pattern of learning, and growth and development, until one reaches the final goal was fascinating. I compared that to my belief that we lived with God before we were born, we come to earth to live a mortal life, we die and live as a spirit, and then we are resurrected into a physical body through the atonement of Jesus Christ. We go through these phases of eternity as part of a pattern of eternal progression.
I sat there in class and wondered if the similarities could be because every human being is a descendant of a common set of parents who knew and taught specific gospel principles. Could it be that over time, those ideas were changed and they morphed into other ideas, but there remain common threads that connect them?
I decided to write my class research paper on a comparison of LDS theology with Asian religions. I drew the conclusion that the commonalities found, are due to having come from one source in the beginning. I got an A+ so I know my teacher liked it. But he did mention that maybe I got a bit over religious for a public school paper.