Our first parents through transgressing the law of God, brought death into the world, but through the death of Jesus Christ, life and immortality were introduced. The one brings into bondage; the other gives us hope of escape, of redemption, that we may come forth with the same kind of body that Adam had before the fall, a body of immortal flesh and bones.
Adam and Eve were immortal, the same as resurrected beings, but previous to their transgression they had no knowledge of good and evil.
After the redemption we will not only have the same kind of bodies that they possessed in the garden of Eden before the fall, but we will have a knowledge of good and evil through our experience.
[J. D. 3:344; Discourse by Orson Pratt delivered in the Tabernacle, Great Salt Lake City; April 13, 1856, quoted in Quotations Dealing with the Relationship of Our First Earthly Parents to Our Heavenly Parents (1830-1978)]