2Co 6:8-10 " by glory and dishonor, by evil report and good report; regarded as deceivers and yet true; as unknown yet well-known, as dying yet behold, we live; as punished yet not put to death, as sorrowful yet always rejoicing, as poor yet making many rich, as having nothing yet possessing all things.
Since, therefore, the natural man is at a greater disadvantage, it is not reason that is at fault, but the condition of his unrenewed mind. Again, The first 6 chapters of I Corinthians reveal the two types of wisdom (or, in the case of the world, "sophistry"). Another problem we discover is that many of the first principles of the world are also false. If they are false, the conclusions based on them are as well.
It becomes clear why the secular idea of autonomous reason (Rousseau) is impossible. Human reason does not exist outside of the human mind; it is dependent on it. Various minds have various abilities to employ reason. The perfect mind does not exist and has not ever existed in humanity save Christ's. Therefore reason is dependent on a flawed human mind. Anything dependent is not autonomous.