God sometimes hardens the hearts of those
who refuse to accept His truths

Romans 9:14-23

What shall we say then? [Is there] unrighteousness with God? God forbid. For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. So then [it is] not of him that willeth, nor of him that runneth, but of God that sheweth mercy. For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. Therefore hath he mercy on whom he will [have mercy], and whom he will he hardeneth. Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will? Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed [it], Why hast thou made me thus? Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour[What] if God, willing to shew [his] wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction: And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,...

See also: II Thessalonians 2-9-12

(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.)