Does this mean you think you have only yourself to credit and thank for your ability to reason? If it's not a "gift," then how did you come by it? By means of theft -- as with Prometheus, who "stole the fire of the gods?" Or by that never-ending piling up of accidents breeding ever more accidents that is known as "natural selection?" How can reason -- which is structured and orderly -- be the product of sheer randomness?
Have you ever really given this issue any serious thought at all?