And for this cause God shall send them a strong delusion, that they should believe a lie:
All Commentaries on 2 Thessalonians 2:11 Go To 2 Thessalonians 2
Augustine of Hippo
AD 430
We can recount many other events clearly showing that from a hidden judgment of God comes perversity of heart, with the result that refusal to hear the truth leads to commission of sin, and this sin is also punishment for preceding sin. For to believe a lie and not believe the truth is indeed sin, but it comes from the blindness of heart which by a hidden but just judgment of God is also punishment for sin. We see this also in what the apostle says to the Thessalonians, “For they have not received the love of truth, that they might be saved. Therefore God sends them a misleading influence that they may believe falsehood.” .