Every holder of the Priesthood out of necessity needs to have a line of his Priesthood authority connect to the official source, Jesus Christ, where the power of the Priesthood comes from.
Here I am as a young man, 3 years after I received the Melchizedek Priesthood.
I was ordained an Elder from my Father, George Roger Gridley
George Roger Gridley was ordained by his father, John Calvert Gridley
John Calvert Gridley was ordained by Miles W. Romney
Miles W. Romney was ordained by Matthew Cowley
Matthew Cowley was ordained by George Albert Smith
George Albert Smith was ordained by Joseph F. Smith
Joseph F. Smith was ordained by Brigham Young
Brigham Young was ordained by Joseph Smith
Joseph Smith was ordained by the Apostles Peter, James and John
Peter, James and John were ordained by the Lord, Jesus Christ