This document contains four motivational quotes by Thomas Edison. Edison's first quote states that when something does not work, it should not be considered a failure but rather a lesson in what will not succeed. His second quote suggests that opportunity often appears as hard work in disguise. The third quote says that if a plan does not work out, it does not mean the idea is useless. And his final quote advises that persevering through challenges by trying just one more time is the surest path to success.