This quote is amazing. I like it because the quote says that if it doesn't really make you shiver its not a big dream or goal. So whenever i plan to do something i know its good if it scares me if not i must reach or dream bigger.
Make sure that God is the one who shut the door. If God really did shut the door then stop banging on it. Otherwise, Matt 7 "Ask and it will be given to you; seek and you will find; knock and the door will be opened to you.