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Let us fix our attention on the blood of Christ and recognize how precious it is to God his Father, since it was shed for our salvation and brought the grace of repentance to all the world. If we review the various ages of history, we will see that in every generation the Lord has offered the opportunity of repentance to any who were willing to turn to him. When Noah preached God’s message of repentance, all who listened to him were saved. Jonah told the Ninevites they were going to be destroyed, but when they repented, their prayers gained God’s forgiveness for their sins, and they were saved, even though they were not of God’s people.
Under the inspiration of the Holy Spirit, the ministers of God’s grace have spoken of repentance; indeed, the Master of the whole universe himself spoke of repentance with an oath: As I live, says the Lord, I do not wish the death of the sinner but his repentance. He added this evidence of his goodness: House of Israel, repent of your wickedness. Tell the sons of my people: If their sins should reach from earth to heaven, if they are brighter than scarlet and blacker than sackcloth, you need only turn to me with your whole heart and say, “Father”, and I will listen to you as a holy people.
In other words, God wanted all his beloved ones to have the opportunity to repent and he confirmed this desire by his own almighty will. That is why we should obey his sovereign and glorious will and prayerfully entreat his mercy and kindness. We should be suppliant before him and turn to his compassion, rejecting empty works and quarrelling and jealousy which only lead to death.

-- Pope Saint Clement of Rome from his First Letter to the Corinthians