Its a big question...especially here. But don't worry I have the answer.... Its not sucess.its not hard work.its not fame , money fortune. It is not even food. Not books.not music.not distraction nit motivation. The answer is choice. you can choose to be happy. Wherever U are whatever is happening its your choice...u don't need any condition but only will. U can be sad in the midst of riches and lap of love. U can be happy if ur homeless hungry and alone. It your choice.if someone has cancer.they can worry..cry or they can choose to go beyond there circumstances and choose happiness. Here's a small piece Don't break the window Just wipe the pane clear, What u seek outside Is right beside u in here Happiness can't be chased She's a swift footed prey Look within and you'll find She's never been away. So happiness is not in things or circumstances its inside you. You can choose to be happy.