朋友,你沉醉于昨日的甜蜜吗？你困扰于昨日的苦恼吗？你沉迷于昨日的辉煌吗？你可又曾为了昨日的失败而耿耿于怀,在碌碌无为的苦闷中慨叹蹉跎？昨天,只是一个回忆。我不懂的东西还多得很呢!关羽是三国时期蜀国的名将,他战功显赫,威震四方,然而他太沉迷于自己过去取得的功绩,因此变得有些骄傲自诩。刘备、诸葛亮进军西蜀,关羽奉命驻守荆州重镇。他蔑视孙权,更不把孙权下面的大将吕蒙放在眼里,吕蒙恰好利用关羽轻敌的心理,偷袭荆州,一举破城,关羽落得个败走麦城的下场。古往今来,大量事实证明,凡是能够正确对待自己昨天的人,都是在自己的事业上有所建树的人；而误视自己昨天的人必不能建造起人生永存的金字塔。做人,应该多向前看,少向后看。随着时代的发展,个人想得到进步,人类想得到进步,社会更应得到进步,这就要求我们不能一直停留在过去,而应该放眼未来,开创未来,忘却“昨天”! Friends, are you intoxicated with yesterday’s sweetness? Are you troubled by yesterday’s distress? Are you addicted to the glory of yesterday? Can you once again bow to yesterday’s failure and sigh in vain depression? Yesterday, it was just a memory. I don’t understand anything more than that! Guan Yu was a famous monk of the Three Kingdoms period. He was a masterpiece of great power and awe-inspiring. However, he was too addicted to his past achievements and became somewhat proud of himself. Liu Bei and Zhu Geliang entered the West Temple and Guan Yu was ordered to station in the town of Jingzhou. He despised Sun Quan, not to mention that under the weight of Sun Quan Lu Meng, Lu Meng just took advantage of Guan Yu’s underdog’s psychology, attacked Jingzhou, and broke the city in one fell swoop. Guan Yu was defeated and lost the end of Mai Cheng. Throughout the ages, a large number of facts have proven that anyone who can correctly treat himself yesterday is a man who has made achievements in his own business; and those who misrepresent himself yesterday cannot build a pyramid that will last forever. If you are a man, you should look more forward and look backwards. With the development of the times, individuals want progress, humanity wants progress, and society needs more progress. This requires us not to stay in the past, but to look to the future, to create the future, and to forget “yesterday”!