Isaiah 45:18

"For thus saith Jehovah that created the heavens, the God that formed the earth and made it, that established it and created it not for a waste, that formed it to be inhabited: I am Jehovah, and there is none else. I have not spoken in secret, in a place in the land of darkness; I said not unto the seed of Jacob, Seek ye me in vain: I Jehovah speak righteousness, I declare things that are right."

Here is the heavenly answer to the objection of the unbelieving leadership of captive Israel to the effect that "God was a God who hid himself' (Isaiah 45:15). The revelation of God through his Holy Word is altogether sufficient for mortal men, as this passage flatly declares. Furthermore, God's oracles are not dim and equivocal pronouncements such as the Delphic oracle to Croesus; but they are plain, truthful, and enlightening.

These two verses set forth the two great witnesses of God's love and concern for fallen mankind. The very manner in which the earth itself has been created, and made so wonderfully suitable for human habitation (in Isaiah 45:18) are exactly the very same grounds of Paul's appeal in Antioch of Pisidia (Acts 14:17) to the effect that the fruitful seasons of the earth were evidence that "God has not left himself without witness."

Isaiah 45:19 appeals to the revelation of God's Word that idols are nothing and that only Jehovah is the One and Only True God; and besides him, there is no other.