Said Elder Hartman Rector, Jr. back in 1973 (his words are still efficacious today):
"Exaltation is a family affair, and so we build temples (houses dedicated to the Lord), but temples are family houses. They are set apart to create families for eternity. The sealing room in the temple is a family room and the altar of the temple is a family altar."
Elder Hartman Rector, Jr., "Prepare Yourself to Raise a Family in the Lord," BYU fireside, 7 January 1973 (italics in original quote, bold emphasis added).