4>18. I state as a probability, and if the common way of speaking of theologians were not in opposition I would assert firmly; nevertheless, I assert that this saying is probable in itself: that just as no one holds an opinion that something is so precisely because he wills to hold that opinion, so no one believes that something is true precisely because he wills to believe that it is true.

Corollary: It is not in the free power of man to believe that an article of faith is true when it pleases him and to believe that it is false when it pleases him.

- Giovanni Pico della Mirandola, 900 Theses, Thirty-One Conclusions in Theology According to My Own Opinion, Rather Opposed to the Common Mode of Speaking of Theologians.