I believe it is what is in your heart and not your mind. I have friends who tell me that they have doubts about their faith, but are absolutely terrified about what God will do.
That tells me that in their heart they do have faith, but the mind has convinced them of something other.
He would not have given His only son if he expected us to not use our minds, ask questions, debate or knew we would live without full righteousness. Many people have become successful because of this, but then we must ask, how and why did this person become successful if our destinies are from The Lord?
He is perfect. He inhabits the favorite personality trait of every person. Including those who play ping pong with their thoughts or we wouldn't have such intelligent, quirky, interesting, crazy, shy, diverse, and amazing humans. And we wouldn't be so interested in what others have to question about the subject.
I truly believe that God reads your heart, the core of your being and all emotion, before he looks at the mind. It is there where love starts, grows, and ends and that is the whole law.
If you love Him in your heart, you are forgiven and that is all that matters. Let your mind be free.