Have you discovered your life's purpose? In a general sense, we know our mission is to know God and enjoy Him forever, but we have a specific ministry to which we are called while on this earth. What are you doing with your call?
Have you ever considered what you fear most? Most would say public speaking, but perhaps in broader terms, it's the matters of life and death themselves.
There's a reason why people say, "It's Greek to me," when they don't understand something, so don't impose too much Greek language on your listeners when you're in the pulpit.