Just like eating an entire elephant, gospel truths are best digested one bite at a time.
"While salvation is an individual matter, exaltation is a family matter. Only those who are married in the temple and whose marriage is sealed by the Holy Spirit of Promise will continue as spouses after death and receive the highest degree of celestial glory, or exaltation. A temple marriage is also called a celestial marriage. Within the celestial glory are three levels. To obtain the highest, a husband and wife must be sealed for time and all eternity and keep their covenants made in a holy temple."
Russell M. Nelson, "Celestial Marriage", October 2008 General Conference