2 Thessalonians / Question
Paul says God sends a “strong delusion” so that people may believe what is false (2 Thessalonians 2:11). He connects this with judgment on those who “did not believe the truth but had pleasure in unrighteousness” (2 Thessalonians 2:12).
In 2 Thessalonians 2:11–12, Paul explains why judgment follows refusal: people reject “the truth” and instead prefer what is wrong, so God gives them over to deception. The result is that they come to believe “the lie,” and this confirms their chosen direction. These verses sit inside Paul’s longer warning about a coming outbreak of deception and lawlessness and how it will mislead many (2Thess.2.3-2Thess.2.12).
Paul presents a moral-and-spiritual chain of cause and result. People refuse “the truth” and prefer what is wrong; then God “sends” an error-producing influence; they come to believe “the lie”; and the stated endpoint is judgment (verses 11–12).
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with 2 Thessalonians 2:11, then read the surrounding section so the answer stays connected to the passage's flow.
11Because of this, God sends them a working of error, that they should believe a lie;