 For Maritain, to say that one can attain, by reason, some knowledge of God is not to say that everyone can do this. Moreover, Maritain also held that it can be reasonable to believe, even in the absence of such arguments or evidence, though what one believes must not contradict the results of ‘true reason’. For example, Maritain argues that, even if one holds that a belief is capable of a rational demonstration, it does not follow that one must be able to provide it; thus, one’s knowledge of ‘revealed truths’ is reasonable, though Maritain (like Aquinas) would never claim that one must be able to produce a philosophical demonstration of them. Further, Maritain allows that theology can “reject as false any philosophic affirmation which contradicts a theological truth” (Introduction to Philosophy, 1920 [1944: 126]).