Do you believe it? As long as you have value, others can perform for you in a way that makes you feel very comfortable, so you don't need to analyze others' motives and reasons. After understanding human nature, what you need to understand more is yourself. Studying others is clever, but studying yourself is true wisdom. Knowing people doesn't require revealing everything; allow genuine feelings and falsehood to coexist. Don't compete with anyone; no one is worth you exhausting yourself. Conscience is not valuable, but it can remember and see cause and effect. So remember, never bully yourself.