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.
The key of the house of David - emblem of his office over the house, to "open" or "shut;" access rested with him.
Will I lay upon his shoulder. So keys are carried sometimes in the East, hanging from the kerchief on the shoulder. But the phrase is rather figurative, for sustaining the government on one's shoulders. Eliakim, as his name implies, is here plainly a type of the God-man Christ, the son of "David," of whom Isaiah (Isaiah 9:6) uses the same language ("the government shall be upon his shoulder"), as the former clause of this verse; and Himself, in Revelation 3:7, the same language as the latter clause (cf. Job 12:14).