"The power and authority of the higher, or Melchizedek Priesthood, is to hold the keys of all the spiritual blessings of the church—"
What a blessing it is to have the power and authority of the Savior on this earth, so that we, and all the peoples of the earth, and all who ever have lived upon it, may be blessed. It stretches from before the beginning of time into the eternities and beyond, and has the power to touch and change the hearts of the children of men, one by one and heart by heart, and endure with them forever.
May we be grateful for the many blessings, too numerous to count, that have come to this earth since that time.
Scripture in Doctrine and Covenants 107:18 https://www.lds.org/scriptures/dc-testament/dc/107.18?lang=eng#17