This assurance of the final fulfillment of God's purpose brought courage to the heart of Isaiah. What though earthly powers array themselves against Judah? What though the Lord's messenger meet with opposition and resistance? Isaiah had seen the King, the Lord of hosts; he had heard the song of the seraphim, "The whole earth is full of His glory;" he had the promise that the messages of Jehovah to backsliding Judah would be accompanied by the convicting power of the Holy Spirit; and the prophet was nerved for the work before him. Verse 3. Throughout his long and arduous mission he carried with him the memory of this vision. For sixty years or more he stood before the children of Judah as a prophet of hope, waxing bolder and still bolder in his predictions of the future triumph of the church.

Forsikringen om, at Guds vilje til sidst ville blive fuldbyrdet, gav Esajas nyt mod. Hvad betød det, at de jordiske magter sluttede sig sammen imod Juda, eller at Herrens tjener mødte modstand? Esajas havde set Kongen, Hærskarers Herre, hørt seraferne synge: "Al jorden er fuld af hans herlighed!" Han havde fået det løfte, at Helligåndens overbevisende kraft ville ledsage Herrens budskab til det vildfarne Juda, og profeten blev styrket til den opgave, som ventede ham. 3. vers. Gennem hele sin lange og vanskelige gerning bevarede han mindet om dette syn. I tres år eller mere løftede han håbets fane for Judas børn og forudsagde med stadig større dristighed menighedens fremtidige sejr.