Purgatory, often imagined as a place, is actually a condition. Someone who dies in God’s grace (and therefore at peace with God and men) but who still needs purification before he can see God face to face is in purgatory. [1030-1031]
When Peter had betrayed Jeses, the Lord turned around and looked at Peter:” And Peter went out and wept bitterly” – a feeling like being in purgatory. Just such a purgatory probably awaits most of us at the moment of our death: the Lord looks at us full of love – and we experience burning shame and painful remorse over our wicked or “merely” unloving behavior. Only after this purifying pain will we be capable of meeting his loving gaze in untroubled heavenly joy.