The heart of gain and loss is too heavy, so don't think too much about the result. Hard work is enough. Efforts are always right. For example, if you pick an apple, it's too high. You try to jump higher and higher every time, but you still can't pick it. You feel depressed, and even people in your industry laugh at you. "Look, I didn't jump or pick apples. You danced for a long time but didn't pick the apple. Don't jump next time. " Do you think so yourself? Why don't you work hard and get the same result? That's not true. I worked hard for a long time, and what I got was that I could jump higher every time. This tree is very tall. Go further and you will meet a tree shorter than it! Efforts will always have results, maybe you just can't see them for a while.