This is an interesting excerpt from Parley P. Pratt’s autobiography about when he first learn from the Prophet Joseph Smith the wonderful principles of eternal families:
“It was Joseph Smith who taught me how to prize the endearing relationships of father and mother, husband and wife; of brother and sister, son and daughter.
It was from him that I learned that the wife of my bosom might be secured to me for time and all eternity; and that the refined sympathies and affections which endeared us to each other emanated from the fountain of divine eternal love. It was from him that I learned that we might cultivate these affections, and grow and increase in the same to all eternity; while the result of our endless union would be an offspring as numerous as the stars of heaven, or the sands of the sea shore.
It was from him that I learned the true dignity and destiny of a son of God, clothed with an eternal priesthood, as the patriarch and sovereign of his countless offspring. It was from him that I learned that the highest dignity of womanhood was, to stand as a queen and priestess to her husband, and to reign for ever and ever as the queen mother of her numerous and still increasing offspring.
I had loved before, but I knew not why. But now I loved-with a pureness an intensity of elevated, exalted feeling, which would lift my soul from the transitory things of this grovelling sphere and expand it as the ocean. I felt that God was my heavenly Father indeed; that Jesus was my brother, and that the wife of my bosom was an immortal, eternal companion; a kind ministering angel, given to me as a comfort, and a crown of glory for ever and ever. In short, I could now love with the spirit and with the understanding also.
Yet, at that time, my dearly beloved brother, Joseph Smith, had barely touched a single key; had merely lifted a corner of the veil and given me a single glance into eternity.