Isaiah 22:22 Meaning I Will Lay the Key of David’s

David is the whole line of humanity and all its experience gathered into one figure, and the key to his house is authority over that entire inheritance. Laid on the shoulder, it is a weight carried by the chosen one, the burden of the promise borne by the person in whom the drama comes true. Whoever holds this key opens and shuts states of consciousness at will, and no appearance can override the choice.

To open with none able to shut is to assume a state and hold it until it hardens into fact, past every argument of reason and sense. To shut with none able to open is to release a state completely, so it no longer governs you. This is the power that fulfills the whole drama inside one person. The one carrying the key on his shoulder decides which states he lives from, and the outer world can only agree.