The Savior Opens the Door to Heavenly Father’s Presence
22 And the key of the house of David will I lay upon his shoulder; so he shall open, and none shall shut; and he shall shut, and none shall open.
Elder Bruce R. McConkie wrote:
“From the day of Adam the term key has been used by inspired writers as a symbol of power and authority. Keys are the right of presidency, and the one holding them holds the reigns of government within the field and sphere of his appointment. In ancient Israel, David was a man of blood and battle whose word was law and whose very name was also a symbol of power and authority. Accordingly, when Isaiah sought to convey a realization of the supreme, directive control and power resident in our Lord, the Son of David, he spoke these words in the Lord’s name: ‘And the key of the house of David will I lay upon his shoulder; so he shall open, and none shall shut; and he shall shut, and none shall open’ (Isaiah 22:22). Centuries later, speaking of Himself, our Lord said to John: ‘These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth’ (Revelation 3:7). Thus, the key of David is the absolute power resident in Christ whereby His will is expressed in all things both temporal and spiritual.”
(Mormon Doctrine, 2nd ed. , 409.)