What God had decided and declared would stand. Cyrus would prosper in his assignment because God had called him to do it. As surely as God had called the host of heaven ( Isaiah 48:13), Israel ( Isaiah 48:12), and Assyria (cf. Isaiah 10:6), He had called Cyrus. [source][source][source]
Context Summary
Isaiah 48:1-16 - The Obstinate And Insincere Rebuked
We are meant to be for God's praise and glory; but we may delay the realization of His high purpose. Our neck iron, our brow brass, we trust in idols and refuse to open our ear. It is necessary, therefore, to send us to Babylon, where, as in a furnace for silver, the dross and alloy are purged away. Many of us are in furnaces which have been rendered needful through our evil ways.
Notwithstanding our sins, God comes to the furnace mouth and chooses us there. For His own sake, His own sake, He does it that His name may not be polluted. He cannot give His glory to another. You cannot account for God's grace to you personally. He must have known all, from the first. Then dare to believe that the reason that prompted Him at the first will suffice to the end. He is not "the son of man that He should repent." He who was the first will be the last. Jesus is Omega as well as Alpha; the end as well as the beginning! Fear not! Revelation 1:17. [source]
Chapter Summary: Isaiah 48
1God, to convince the people of their foreknown obstinance, revealed his prophecies 9He saves them for his own sake 12He exhorts them to obedience, because of his power and providence 16He laments their backwardness 20He powerfully delivers his people out of Babylon
What do the individual words in Isaiah 48:15 mean?
I[even] Ihave spokenYesI have called himI have brought himand will prosperhis way
Parse: Verb, Qal, Perfect, first person common singular, third person masculine singular
Root: קָרָא
Sense: to call, call out, recite, read, cry out, proclaim.