evidence: Mark Twain [Samuel Clemens] humorist, essayist, novelist [...] This quote sums up on of his main messages in the story of Tom Sawyer. [...] The old Harvard Square fire chief often shared morning breaks with me. Occasionally he would tell me a story, stories that were true and unusual; stories I looked forward to. One day the old fireman looked at me, his eyes moist with wisdom and regret and he said, "Peter there were so many things that I wanted to do during my life. Take my family to special places, go on walks with my daughter.There were hundreds of things I was going to do someday. And now here I am in the twilight of my life and there are very few some days left. My life has gone by in the blink of an eye and so many dreams and plans went unfulfilled. Please don't make the same mistake. Follow your dreams, act on your plans, and do it now not someday. Don't let your life run through your fingers like water, grab hold and live every day as if it will be your last." I was sixteen then, I am fifty six now. How priceless were his words.