This sentence usually appears in novels or movies to describe the protagonist who once thought he had found true happiness, but when he devoted himself to it, he found that this happiness was not real or just his own one-sided imagination. We will encounter similar situations in our lives. Sometimes, we believe in our own standards of happiness too much and ignore the real world around us. When we give without reservation, we may find that we are not getting what we deserve or that our efforts are misunderstood or ignored. At this time, we may feel disappointed with our efforts and even begin to doubt our own happiness. But we can't give up on finding true happiness. We need to learn to accept the uncertainty of life and learn to adjust our expectations and standards. At the same time, we also need to learn to cherish the happiness in front of us and not pursue the so-called perfection too much.