Salvation & the Sacraments
Purgatory
Purgatory is the final purification of those who die in God's grace but still need to be made perfectly holy before entering heaven. It's not a second chance and not a third place — everyone in purgatory is saved and heaven-bound.
Nothing unclean can enter heaven
Heaven admits nothing impure, and without holiness no one will see the Lord. Since few die perfectly holy, God's mercy completes the work — that final purification is what ‘purgatory’ names.
Saved — but as through fire
Paul describes a person whose works are burned up yet who ‘will be saved, but as through fire.’ That is neither hell (he's saved) nor the immediate joy of heaven (he passes through fire) — it is a purifying loss after death.
God's people pray for the dead
Judas Maccabeus makes atonement for fallen soldiers so they may be released from their sin. Praying for the dead only makes sense if the dead can still be helped — not the damned, not those already in glory. Jesus even speaks of sin not forgiven ‘in this age or the age to come.’
Common objections
“Purgatory cheapens the Cross — Jesus paid it all.”
Purgatory is an EFFECT of the Cross, not a rival to it — it applies Christ's finished work to purify us. Being cleansed of the last remnants of sin is being conformed to Christ, not paying him back. Even fully forgiven sin leaves attachments that must be healed.
“It's not in the Bible — the word never appears.”
Neither does ‘Trinity,’ but the reality is taught. The word aside, Scripture shows a post-death purification (1 Cor 3:15), forgiveness possible in ‘the age to come’ (Mt 12:32), and prayer for the dead (2 Macc 12) — which is exactly what the doctrine means.
Scripture quoted verbatim from the World English Bible (public domain).