There's nothing in the world for you to be sad, and as such there's something to worry about. Things let you down are the things that keep you habituated to make things happen hurriedly by you in any way. And those things need not make you to get worried to understand how worries matters; and fear for problems, for example to earn money and for things that's not at all in your hand can keep you think naturally within your zone of comfort.There's no...