"To declare His righteousness." What is declaring of righteousness? Like the declaring of His riches, not only for Him to be rich Himself, but also to make others rich, or of life, not only that He is Himself living, but also that He makes the dead to live; and of His power, not only that He is Himself powerful, but also that He makes the feeble powerful.
So also is the declaring of His righteousness not only that He is Himself righteous, but that He doth also make them that are filled with the putrefying sores of sin suddenly righteous. And it is to explain this, viz. what is "declaring," that he has added, "That He might be just, and the justifier of him which believeth in Jesus."
Doubt not then: for it is not of works, but of faith: and shun not the righteousness of God, for it is a blessing in two ways; because it is easy, and also open to all men. And be not abashed and shamefaced. For if He Himself openly declareth Himself to do so, and He, so to say, findeth a delight and a pride therein, how comest thou to be dejected and to hide thy face at what thy Master glorieth in?
- St. John Chrysostom (Homilies on Romans 3)