John Gills Exposition of the Bible Commentary - Isaiah 43:19
Behold, I will do a new thing ,.... A wonderful and unheard of thing, and therefore introduced with a "behold", as a note of admiration; the same with the new thing created in the earth, Jeremiah 31:22 , the incarnation of the Son of God; who took flesh of a virgin, appeared in the likeness of sinful flesh, and was made sin and a curse for his people, in order to obtain eternal redemption for them; which blessing, though not newly thought of, resolved on, contrived, and agreed upon, that... read more
Matthew Henry's Complete Commentary - Isaiah 43:14-21
To so low an ebb were the faith and hope of God's people in Babylon brought that there needed line upon line to assure them that they should be released out of their captivity; and therefore, that they might have strong consolation, the assurances of it are often repeated, and here very expressly and encouragingly. I. God here takes to himself such titles of his honour as were very encouraging to them. He is the Lord their Redeemer, not only he will redeem them, but will take it upon him as... read more