Faith versus Belief

More often people advise us to have faith in God. What is this faith? I do believe in His existence. I do not follow the rituals traditionally, but yes I do love Them in my own way. I know HE is the guiding force. But isn't faith accepting the decisions without questioning. Is it really possible for us to surrender to His decision? By questioning His decision, do I become an atheist? I do believe Him , but not enough complete faith in accepting the decisions He makes are the right ones.