The authority is 100% from Heavenly father. Yesterday I was training with my wrestling school and I had pulled muscles in between the top of my spine and my neck from landing incorrectly. Last night as I prepared for bed I got on my knees.
During prayer I begged Heavenly father through the authority of the Melkizedek Priesthood and in the name of Jesus Christ to take a way my pain as I cannot physically handle it.
I was so close to tears due to the level of pain. I went to sleep and when I woke I had thought it was time to get out of bed and get ready for work when to my amazement my neck no longer hurt. The pain was gone. I got down on my knees and prayed again, I thanked Heavenly father for healing me and I felt the Holy spirit like never before. It was so Strong that it made my entire body quiver like I had just taken a Russian Ice bath (If you have not had one before just imagine how it would feel).
This is the true church of Jesus Christ, re-established on the earth and I am absolutely blessed to be part of the church, In The Name Of Jesus Christ, Amen