this is one of my favorite verses in scripture, as it brings the point home that figuring it all out is not in the cards for us. the greatness of God puts Him on a plane that we can never hope to attain. for that reason, though, it often seems so removed from us that we can't feel it or touch it. but this verse allows me to believe without having to understand the minutiae of it.
i think wrestling with your faith is a very good sign of taking it seriously. blind faith is just that. it is unexamined and often unsympathetic to inquiry. doubt comes about because you actually spend time thinking about your relationship with Christ, searching for authenticity in your walk with God. if you do this, doubt will dog your walk always, but will spur you on toward an uncompromising experience of faith.
take heart. some of the giants of the faith have wrestled with these same issues. augustine had a titanic battle with his thrilling in the pleasures of the flesh vs. his call to the Lord.
Christ has a precedent for having pity on those who are trying hard to make their belief real. Mark 9:24 is the climax of a story of a man who comes to Christ in a desperate attempt to save his child from the horrible convulsions that torment him. He wants to believe so badly, that finally he shouts out "I do believe; help me overcome my unbelief!", and Jesus accepts this rather anemic profession of faith and heals the boy.
treasure your times of trial with your faith. they are the fires that will temper your resolve, and they are the challenges that will keep you close to God as you consider the truth you pursue.