There are days where you feel hopeless, days where you feel lost, scared or in fact worthless too. Everyone goes through, Going through tough times is like a part of life you can't escape it. Life is like a riding a bicycle you need two wheels to balance it, just like that you need happiness and sadness to balance and to know the real meaning of life. You can't know the real meaning of happiness if you have never been sad. Sometimes I hear people say to the people who are sad or going through a tough time "Don't be sad there are people who are going through a lot worse than this" you know it's just like saying to the people who are happy "Hey, don't be happy they are people who are more happier than you"
One needs to realize that you can't be always happy, you need sadness too, to understand life. There's a saying: "You can't have a rainbow without a rain or storm" Just like that one needs a rain to see the rainbow.