The angelic hosts in 1 Nephi 11, tell Nephi of two births. Both are acts of "condescension." This is the meaning of the Tree of Life. God condescended to be in mortality, condescended into the waters of baptism, and condescended below all of us in Gethsemane and on the Cross.
Condescension IS the Love of God. Those that condescend and offer the Pure Love of Christ, will then be exalted by God. The Great and Spacious Building is on the opposite side of the gulf in Lehi's Dream. It is juxtaposed to the Tree of Life and therefore represents pride, or "lifting oneself up" only to fall. "Son of God" is not so much a description but rather a title. It is used in relation to the condescension of God.
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