Take counsel — To maintain the cause of their idols. This — This great work, Babylon's destruction, and the redemption of God's people.
Related Commentaries of Isaiah 45:21
Isaiah 45:21
21 Tell ye, and bring them near; yea, let them take counsel together: who hath declared this from ancient time? who hath told it from that time? have not I the LORD? and there is no God else beside me; a just God and a Saviour; there is none beside me.