"Goodness is the only investment that never fails." by Henry David Thoreau

This quote means that if you are a good person no matter what you do or happens to you, you will get good things coming your way. This is because if you don't know what pain is, then you don't know what happiness is. This is why you should smile no matter what happens to you. When you are a good person, the universe will reward you. You just have to keep a positive mind and attitude. The only person that will never leave you is you. So no matter what happens in your life and the people you lose, goodness will never fail you in your greatest and saddest moments.