When one lift weights he does not believe that he can not lift more with practice. I believe I can learn more when challenged by non believers, the challenge of other christians is at best arguing about denominational differences, if you haven't notice I do not confront other christians about denominational differences, I will however take on the ones who blatantly misrepresent christianity.
God loves those who believe and those who do not and the same goes for me, you have no choice in this matter. That puts the matter of total free will to rest.