Immediately the boy’s father exclaimed, “I do believe; help me overcome my unbelief!” ~ Mark 9:24 (NIV)
How about you, did you have that eureka moment in your life when you suddenly realised that you do believe in God? Or have you always known God was there and so have believed in Him for as long as you remember?
However, and whenever you told God you truly believed in Him, doesn’t really matter, as ultimately the fact that you do believe is all God asked of you.