Isaiah 22:14

The Lord had revealed to Isaiah that He would not forgive their unbelief in Himself. As long as they continued to trust in themselves rather than in Him, He would not save them.

Unbelief persisted in until death is the only sin that God will not forgive. In the unsaved it results in eternal damnation, and in the saved it results in the loss of some eternal reward plus temporal punishment in some cases. However, as long as people can repent there is hope. Repentance was still possible for Isaiah’s original audience when he gave this message. The warning passages in Hebrews explain that a time can come when people are no longer able to repent.

". . . the oracle stands here as the proclamation of a judgment deferred but not repealed." [Note: Delitzsch, 1:397-98.]

The oracles against Shebna and Eliakim that follow are the only ones on individuals in chapters 13-27. They show that the choice between faith and works, with its attending results, is individual as well as national. They also provided immediate signs of the prophecies that Isaiah gave here concerning the fate of Jerusalem in the future. Shebna was as self-reliant individually, as the people of Jerusalem were collectively (Isaiah 22:15-19). Eliakim was an object of trust by the members of his family and the residents of Jerusalem and so risked taking the Lord’s place in their affections (Isaiah 22:20-25).