From the time I was born my parents, the church and my school brainwashed me into the belief of god's existence until I was 18 years old. They used sacraments, prayers, mantras, bibles, other religious books and continuous church attendances. My only defence against all of that was logic and after many years I concluded there is no God. Of course I felt guilty about winning the mental arguement but the sense of freedom more than compensates for that.