522. First, though, let me state what divine mercy is. Divine mercy is a pure mercy toward the whole human race with the intent of saving it, and it is constant toward every individual, never withdrawing from anyone. This means that everyone who can be saved is saved. However, no one can be saved except by divine means, the means revealed by the Lord in the Word. Divine means are what we refer to as divine truths. They teach how we are to live in order to be saved. The Lord uses them to lead us to heaven and to instill heaven's life into us. The Lord does this for everyone; but he cannot instill heaven's life into anyone who does not refrain from evil, since evil bars the way. So to the extent that we do refrain from evil, the Lord in his divine mercy leads us by divine means, from infancy to the end of life in the world and thereafter to eternity. This is the divine mercy that I mean. We can therefore see that the Lord's mercy is pure mercy, but not unmediated: that is, it does not save people whenever it feels like it, no matter how they have lived.

169. Throughout the created universe, in its largest and smallest instances alike, we find these three--purpose, means, and result. The reason we find them in the largest and smallest instances of the created universe is that these three are in God the Creator, who is the Lord from eternity. Since he is infinite, though, and since in one who is infinite there are infinite things in a distinguishable oneness (as explained in 17-22 above), these three are a distinguishable oneness in him and in the infinite things that belong to him. This is why the universe, being created from his reality and (if we look at its functions) being an image of him, retains these three in each of its constituent details.