The holy one, the true one — Two great and glorious names He that hath the key of David — A master of a family, or a prince, has one or more keys, wherewith he can open and shut all the doors of his house or palace. So had David a key, a token of right and sovereignty, which was afterward adjudged to Eliakim, Isaiah 22:22. Much more has Christ, the Son of David, the key of the spiritual city of David, the New Jerusalem; the supreme right, power, and authority, as in his own house. He openeth this to all that overcome, and none shutteth: he shutteth it against all the fearful, and none openeth. Likewise when he openeth a door on earth for his works or his servants, none can shut; and when he shutteth against whatever would hurt or defile, none can open.
Related Commentaries of Revelation 3:7
Revelation 3:7
7 And to the angel of the church in Philadelphia write; 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;