Talking about God

Why is it so difficult to talk about God? I can so easily say that "I'm a Lutheran; we believe in the Trinity and infant baptism," but it is incredibly difficult if not impossible for me to say "I believe in God," "I believe in Jesus Christ," or even "I believe" anything. When talking about the Bible, I can talk about the biblical characters all I want, even Jesus as a character, as long as it's in the context of a specific story. However, as soon as I start talking about Jesus as a person or as God, I freeze up. In the same way, it's easy enough to ask people if they go to church and where, and also to answer that question, but is an altogether different situation trying to ask someone what they believe, and even worse to answer that. I can tell people where I go to church and all about what I'm involved in, but I am unable to answer the simple question of "what do you believe?" This needs to change, this needs to be fixed. After all, Jesus saved me. He has given me life, both in this world and forever. I shouldn't be ashamed to talk about it, I should stand certain about the Truth that I believe in.