1030 All who die in God's grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven.Let us focus especially on the last sentence of that paragraph. Heaven is defined as the soul's eternal life in the presence of God. God is all-holy and all-perfect. In order to be in the presence of God, we too must be all-holy and all-perfect. Let us look at the scriptures for some evidence:
"Speak to the whole Israelite community and tell them: Be holy, for I, the Lord your God, am holy." - Leviticus 19:2
"Strive for peace with everyone, and that holiness without which no one will see the Lord." - Hebrews 12:14Clearly, as these passages point out, we are called to holiness in this life. Of course, we often miss the mark and fall into sin. Christ is the way out of sin and back on track (through the graces of confession), but we sometimes still have to suffer the effects of a sin that has been confessed (in a case of adultery for instance). We are often still far away from God and his holiness, even when God's mercy has restored our relationship to him. This is where the doctrine of purgatory has its roots: we need to be completely purified, of both the spiritual and temporal consequences of our sin before we can stand in the presence of a God who is perfection.
The title of this post refers to an episode that occurs early in the book of the prophet Isaiah. Isaiah is being called by God and has a vision:
"In the year that King Uzziah died I saw the Lord sitting upon a throne, high and lifter up; and his train filled the temple. Above him stood the seraphim; each had six wings: with two he covered his face, and with two he covered his feet, and with two he flew. And one called to another and said: "Holy, holy, holy is the Lord of hosts; and the whole earth is full of his glory." And the foundations of the thresholds shook at the voice of him who called, and the house was filled with smoke. And I said: "Woe is me! For I am lost; for I am a man of unclean lips, and I dwell in the midst of a people of unclean lips; for my eyes have seen the King, the Lord of hosts!" Then flew one of the seraphim to me, having in his hand a burning coal which he had taken with tongs from the altar. And he touched my mouth, and said: "Behold, this has touched your lips; your guilt is taken away, and your sin forgiven."" - Isaiah 6:1-7In this passage we see the entire notion of purgatory played out, as it were, before the fact of Isaiah's death. Isaiah's vision is of God in glory in heaven (the temple), surrounded by the seraphim who are shouting to one another about God's triune holiness. Isaiah senses his unworthiness to be in the presence of God both for having unclean lips and for even living among those with unclean lips. God, in his mercy, sends a seraphim with a hot coal that purifies - or purges - Isaiah's tongue and takes away both his sins and the guilt of his sins. Isaiah is then allowed to stand in the presence of God.
We can hope for a similar outcome at the time of our deaths. We know Isaiah was not in mortal sin, for he was favored by God with the gift of revelation of prophecy. However, even a prophet, a holy man of God, was not worthy to stand in the presence of God without being cleansed by fire from the temple. Even if we receive God's mercy through confession and are reconciled to him through the power of the Cross, we still have guilt and sadness and suffering because of our sins. How happy for us that all of this will be taken away by the cleansing fires of purgatory so that we may stand before God unblemished and holy as he is holy.


