Isaiah: He received his prophetic mission in the temple of Jerusalem when Israel was at its lowest moral due to the invasion by the Assyria. Isaiah witnessed the majesty, holiness, and glory of God. Before God, he felt unworthy and sinful. He also felt being purified of his wickedness by the Seraphim (red winged angel). God sent him to a mission to which he responded, "Here I am Lord, send me!" He's best remembered for his messianic oracles found in Immanuel prophecies, the announcement of the upcoming birth of Jesus, and the Prince of peace