Whenever I feel sad and down, disappointed and tired of this life, I would say to myself, “A human being must face pain, endure suffer, only then could really understand happiness, being grateful and become sincere.”
Some people define the source of happiness or sadness as desires. They then able to deduct their desires, as if sacrificing their own happiness, time, and even chance, in order to make other(s) happy. Maybe this kind of people are the happiest people indeed.
So I guess that’s right, living in this world, as long as we have a peaceful heart, a sincere living, those sacrifices means nothing to you.