I agree with you, life is two sided. No one can say he or she hasn't fail in life. That's why we have a lot of success stories of people who failed many times and never gave up.
Accepting life and what it present to you is important.

We have a lot of people who do not understand life to some extent and then they end their life by committing suicide. those are the type that feels like nothing good will ever come their way cos they always fail. They believe quitting will settle it.

Many successful people we have today are those who tasted the two side of life, the bitter and the sweet part of it, but they didn't quit, they kept pushing till they got what they wanted.

We are all expected to view life that way and never give up. Nobody is a failure that's my believe. Only those who limit themselves end up as failures.