hardens the hearts of those
who refuse to accept His truths
II Thessalonians 2:9-12
[Even him], whose coming is after the working of Satan with all power and signs and lying wonders, And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. And for this cause God shall send them strong delusion, that they should believe a lie: That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
See also: Romans 9-14-23
(Think about these verses the next time you hear an evolutionary scientist talk about how certain he/she is about the "truth" of evolutionism. It is especially appropriate to consider the possibility God may be causing them to have a strong delusion when one also takes into consideration the fact that very few of society's elite are ever called by God into His service.)