John Gills Exposition of the Bible Commentary - Isaiah 63:19
We are thine ,.... Thy children, thy people, thy subjects. Some read it, taking a word from the next clause, "we are thine of old", or "from everlasting" F8 היינו מעולם "non fuimus tui ab omni aevo", Grotius; "a seculo", Pagninus, Montanus. ; as the Lord's special people are, being chosen by him in Christ before the foundation of the world, and taken into an everlasting covenant by him, when he became their God, and they his people; agreeably to which is the Targum, "we are thy... read more
Matthew Henry's Complete Commentary - Isaiah 63:15-19
The foregoing praises were intended as an introduction to this prayer, which is continued to the end of the next chapter, and it is an affectionate, importunate, pleading prayer. It is calculated for the time of the captivity. As they had promises, so they had prayers, prepared for them against that time of need, that they might take with them words in turning to the Lord, and say unto him what he himself taught them to say, in which they might the better hope to prevail, the words being of... read more