从下面这篇课文里提炼一下吧.

　　ProfitsofPraise

　　ItwastheendofmyexhaustingfirstdayaswaitressinabusyNewYorkrestaurant.Mycaphadgoneawry,myapronwasstained,myfeetached.TheloadedtraysIcarriedfeltheavierandheavier.Wearyanddiscouraged,Ididn'tseemabletodoanythingright.AsImadeoutacomplicatedcheckforafamilywithseveralchildrenwhohadchangedtheirice-creamorderadozentimes,Iwasreadytoquit.

　　Thenthefathersmiledatmeashehandedmemytip."Welldone,"hesaid."You'velookedafterusreallywell."

　　Suddenlymytirednessvanished.Ismiledback,andlater,whenthemanageraskedmehowI'dlikedmyfirstday,Isaid,"Fine!"Thosefewwordsofpraisehadchangedeverything.

　　Praiseislikesunlighttothehumanspirit;wecannotflowerandgrowwithoutit.Andyet,whilemostofusareonlytooreadytoapplytoothersthecoldwindofcriticism,wearesomehowreluctanttogiveourfellowsthewarmsunshineofpraise.

　　Why-whenonewordcanbringsuchpleasure?Afriendofminewhotravelswidelyalwaystriestolearnalittleofthelanguageofanyplaceshevisits.She'snotmuchofalinguist,butshedoesknowhowtosayoneword-"beautiful"-inseverallanguages.Shecanuseittoamotherholdingherbaby,ortolonelysalesmanfishingoutpicturesofhisfamily.Theabilityhasearnedherfriendsallovertheworld.

　　It'sstrangehowcharyweareaboutpraising.Perhapsit'sbecausefewofusknowhowtoacceptcomplimentsgracefully.Instead,weareembarrassedandshrugoffthewordswearereallysogladtohear.Becauseofthisdefensivereaction,directcomplimentsaresurprisinglydifficulttogive.Thatiswhysomeofthemostvaluedpatsonthebackarethosewhichcometousindirectly,inaletterorpassedonbyafriend.Whenonethinksofthespeedwithwhichspitefulremarksareconveyed,itseemsapitythatthereisn'tmoreefforttorelaypleasingandflatteringcomments.

　　It'sespeciallyrewardingtogivepraiseinareasinwhicheffortgenerallygoesunnoticedorunmentioned.Anartistgetscomplimentedforagloriouspicture,acookforaperfectmeal.Butdoyouevertellyoulaundrymanagerhowpleasedyouarewhentheshirtsaredonejustright?Doyoueverpraiseyourpaperboyforgettingthepapertoyouontime365daysayear?

　　Praiseisparticularlyappreciatedbythosedoingroutinejobs:gas-stationattendants,waitresses-evenhousewives.Doyouevergointoahouseandsay,"Whatatidyroom"?Hardlyanybodydoes.That'swhyhouseworkisconsideredsuchadrearygrind.Commentisoftenmadeaboutactivitieswhicharerelativelyeasyandsatisfying,likearrangingflowers;butnotaboutjobswhicharehardanddirty,likescrubbingfloors.Shakespearesaid,"Ourpraisesareourwages."Sincesooftenpraiseistheonlywageahousewifereceives,surelysheofallpeopleshouldgethermeasure.

　　Mothersknowinstinctivelythatforchildrenanounceofpraiseisworthapoundofscolding.Still,we'renotalwaysasperceptiveaswemightbeaboutapplyingtherule.OnedayIwascriticizingmychildrenforsquabbling."Canyouneverplaypeacefully?"Ishouted.Susannalookedatmequizzically."Ofcoursewecan,"shesaid."Butyoudon'tnoticeuswhenwedo."

　　Teachersagreeaboutthevalueofpraise.Oneteacherwritesthatinsteadofdrowningstudents'compositionsincriticalredink,theteacherwillgetfarmoreconstructiveresultsbyfindingoneortwothi