How can you actually know God exists rather than just believing?

If somebody says, "Do you believe in God?" I always feel like that's the dumbest question. What do you mean? God just is. I don't even know how to describe that. But if you said to me, "Why do you know that he is?" then I would say: ah, this is the story of my life. I know God through my life, through what has happened in my life, and through encountering him. I don't know him because I read about him in a book. So many people know about God, and some people even know him. Try to be the person who knows God.