What's your sign?  Are you a stop sign or a yield sign?  How about a "yikes" or "the end"?  I was listening to some worship music this afternoon and a song came on that I have heard many times but never really paid attention to the words.  But today was different.  One part really stuck in my head.  It was Kutless' "What Faith Can Do" and the part that got me was.
                      "It doesn't matter what you've heard
                        Impossible is not a word
                        It's just a reason
                        For someone not to try"
Street signs have to be obeyed.  But, when we put signs up in our life that make us stop short or not even try, then we are missing a big part of life.  Impossible is not a word, it is an excuse.