President Packer said in an address on the "Family: A Proclamation to the World":

I’m grateful to participate in this meeting and greet all of you across the world on this very sacred and solemn occasion with perhaps the most important subject that we could bring to you from the leadership of the Church. We have watched, as you have watched, the patterns of the world and have become increasingly concerned about the matters of home and family...A proclamation in the Church is a significant, major announcement. Very few of them have been issued from the beginning of the Church. They are significant; they are revelatory. And at that time, this was a little more than 10 years ago, the Brethren issued “The Family: A Proclamation to the World.” It is scripturelike in its power...We know in the Church from the doctrines that have been revealed to us that we had a premortal existence. It didn’t all begin with the population of the earth with humankind. And the doctrines of the gospel were not new when they were revealed to the Prophet Joseph Smith. They were from all eternity and will be for all eternity. Now listen carefully:“All human beings—male and female—are created in the image of God. Each is a beloved spirit son or daughter of heavenly parents, and, as such, each has a divine nature and destiny. Gender is an essential characteristic of individual premortal, mortal, and eternal identity and purpose.”
“In the premortal realm, spirit sons and daughters knew and worshiped God as their Eternal Father and accepted His plan by which His children could obtain a physical body and gain earthly experience to progress toward perfection and ultimately realize his or her divine destiny as an heir of eternal life. The divine plan of happiness enables family relationships to be perpetuated beyond the grave.”

This was a little of what President Packer said that has touched me and strengthened my faith in that Proclamation. I'm thankful for it.