Yes I have strong belief. I feel secure and blessed with the thought of almighty God in my mind.Spirituality makes us a good human being, that is why I have strong faith in God.
Although I do not believe in idol worship but yes I feel the presence of strong God that helps me to take better decision and guide me when I am doing something sinful.
I do not believe on invisible things, so I do not believe that God exist. We need someone who is more powerful than us, so that we can follow him/her when we are low and scared from the difficulties of life. God is just the illusion of human mind nothing else.