45:23 I have sworn by myself, the word is gone out of my mouth [in] {a} righteousness, and shall not return, That to me every {b} knee shall bow, every tongue shall swear.
(a) That is, that the thing which I have promise will be faithfully performed.
(b) The knowledge of God and the true worshipping will be through all the world, Rom 14:11, Phil 2:10 by which he signifies that we must not only serve God in heart, but declare the same also by outward profession.
45:23 In righteousness - It is what I will faithfully perform. Return - Without effect. It is a metaphor from ambassadors, who sometimes return to their princes without any success in their business. Every tongue - Not only the Jews, but all nations.
45:20-25 The nations are exhorted to draw near to Jehovah. None besides is able to help; he is the Saviour, who can save without the assistance of any, but without whom none can save. If the heart is brought into the obedience of Christ, the knee will cheerfully obey his commands. To Christ men shall come from every nation for blessings; all that hate his cause shall be put to shame, and all believers shall rejoice in him as their Friend and Portion. All must come to him: may we now come to him as the Lord our Righteousness, walking according to his commandments.