Time flies. In today's rapidly developing society, we pursue more and more and want more and more. Time passes, things change and people change. Time changes each of us, but we cannot change time. When we were young, we always wanted to break away from the shackles of adults and explore the outside world alone. When one day we walk out of campus full of ambitions, what greets us is the reticence and material drive of the real society. When we stop our hurried and exhausted steps and look back, we realize that the best has always been around us, but we didn't know it yet. When we want to start it all over again, our parents have already turned gray and our playmates have disappeared. If you had it to do over again, would you repay your parents the love they once gave you without reservation, and love them as they once loved you more than yourself? Would you give your former buddies more patience and tolerance when they make mistakes?