Purgatory is a final purification for those who die in God's friendship but are not yet perfectly holy. It is not a second chance or a third destination: everyone in purgatory is saved and on the way to heaven. The Church prays for them, especially at Mass.

What is purgatory?

What the Church teaches

"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" (CCC 1030).

Why purification?

"nothing unclean will enter" (Revelation 21:27). Most of us die forgiven but still attached to sin in some way — selfish habits, unhealed wounds. Purgatory is God's love completing what was begun, like gold refined by fire.

Scriptural roots

"Saved, but only as through fire." Paul describes a judgement in which a person's work is burned up "the person will be saved, but only as through fire" (1 Corinthians 3:15).
Prayer for the dead. Judas Maccabeus made atonement for the dead "that they might be absolved from their sin" (2 Maccabees 12:46). Prayer would be pointless for those in heaven, who do not need it, or in hell, who cannot be helped.
Forgiveness "in the age to come." Jesus speaks of a sin that will not be forgiven "either in this age or in the age to come" (Matthew 12:32), implying some forgiveness after death.

The early Church prayed for the dead

Inscriptions in the Roman catacombs ask for prayers for the departed. Saint Augustine recalls his mother Monica asking, "Remember me at the altar of the Lord."

What purgatory is not

Not a place of punishment for the damned.
Not a denial that Christ's sacrifice is sufficient — it is Christ's grace that purifies.
Not something we can describe in physical detail. The Church defines its reality, not its geography.

How we can help

Offer Masses, prayers, almsgiving and indulgences for the dead (CCC 1032). A simple prayer: "Eternal rest grant unto them, O Lord, and let perpetual light shine upon them."