Thinking is not the same as worrying. Great men must always think for great things to happen. Thinking is the only evidence that you are a living being. When you stop thinking, you start stinking that means you are dead, stagnant, and decaying. As entrepreneurs we must keeping thinking to make the world a better place for all. Just like the great Albert Einstein, Thomas Edison, Michael Faraday, etc. They were all great thinkers of reputable history.