“I’m witnessing to my mom, who has questions by the boxcar about Purgatory. Can you help?”
This place where men must go after death to purge their sins is an invention of religion. The word purgatory comes from the word purge, and the Bible says that Christ “by Himself purged our sins” without any help from us (Heb. 1:3).
The Lord told the dying thief, “To day shalt thou be with Me in paradise” (Luke 23:43). This is significant, since the inspired Word of God calls this man a thief, and it was his own testimony to the other thief that “we receive the due reward of our deeds” (Luke 23:41). That is, he was admitting he had not been framed or misjudged, but had indeed committed crimes worthy of the death penalty. If there was a Purgatory, this man would have gone there, yet we have the Lord’s word on it that he did not.
If anyone needed to go to Purgatory, it was the carnal Corinthians! Yet Paul told even these sinful believers that they could be “confident” that “to be absent from the body” is “to be present with the Lord” (II Cor. 5:8). source