Obstacles can not stop you. Problems can not stop you. Other people can not stop you. Only you can stop you - Jeffrey Gitomer

The world is not the place to think about all the problems. Everyone knows that life is only once and there is no reproduction in that regard. Therefore, life will be futile if only to think about all the problems, think how you can know the problem well and can solve all implied messages in it. Be a genius not just a smart person. Because geniuses can solve problems with mature minds rather than just words.