Dialecticalpointofview,errorisnotterrible,sigh,sad,fearisnot.Errorfailurewithtruth,withsuccess,likethesleepisboundupwiththenightawake,thesameasthedawn.Amanfromthewrong"dream"inthewake,willwithnewwisdomandstrengthtothetruth.Throughthedarknessoffailure,itindicatesthatthesuccessofthedawn.Hagelsaid:"themistakeitselfbuttotruthisaninevitablepartof","becauseofthiserror,thetruthwillappear".People'sknowledge,abilityandcreation,notonlyinsummingupthesuccessfulexperience,alsointhelessonsoffailureisproduced.Davidspokeabouthissuccess,hesaid:"Iamthemaindiscoveryisaffectedbythefailureofinspirationandmake.“

　　用辩证的观点来看,错误并不可怕,叹息、感伤、畏惧是大可不必的.错误同真理,失败同成功,像睡梦同清醒、黑夜同黎明一样紧密相联.一个人从错误的“梦”中醒来,就会以新的智慧和力量奔向真理.经历着失败的黑夜,正预示了成功的黎明即将来临.黑格尔说过：错误本身乃是“达到真理的一个必然的环节”,“由于这种错误,真理才会出现”.人们的知识、能力以至发明创造,并不单单是在总结成功经验,也是在汲取失败教训的基础上产生出来的.戴维谈到自己获得成功,就说过：“我的那些最主要的发现是受到失败的启示而作出的.”