Revelation 5

As John begins to weep because it appears to him that no one is worthy to open the book and seven seals or the plan of salvation, John then hears -

"...Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof."  (Revelation 5:5)

As the Savior makes a covenant, taking the book out of the right hand of the Father, it appears that all saints rejoiced and -

"...fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints.
9 And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;
10 And hast made us unto our God kings and priests: and we shall reign on the earth."  (Revelation 5:8–10)

"Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing."  (Revelation 5:12)

What a great description of our premortal life and the plan of salvation.