How do we know that a god exists?
Well it depends...which god are you talking about?
How do I play the guitar if I don't even know where to begin?
Playing the guitar is easy if you have someone to explain it to you very well! I can help with that.
Will I ever be able to pass this accounting class if I am no good at math?
Fear not! For it is a misconception that one must be good at math to be good at accounting (although it doesn't hurt). Anyone can do it!