Even if We were to send down angels to them (whenever they wished it), and the dead were to speak to them, and We were to assemble before them, face to face, all the creatures (to bear witness to the truth of the Message you bring), they would still not believe, unless God so willed (and came to their aid out of His pure grace); but most of them are ignorant (they pursue worldly pleasures completely unaware of belief and mindless of their own selves).