请用3-5句话概括下面文章的大意（用英文概括并将大意翻译成中文）

Compassionisadesirewithinustohelpothers.Witheffort,wecantranslatecompassionintoactions.Anexperiencelastweekendshowedmethisistrue.Iworkpart-timeinasupermarketacrossfromabuildingfortheelderly.Theseoldpeopleareourmaincustomers,andit’snothardtolosepatienceovertheirslowness.ButlastSunday,oneagedgentlemanappearedtoteachmeavaluablelesson.Thisuntidymanwalkeduptomyregister（收款机）withaboxofbiscuits.Hesaidhewasoutofcash,hadjustmovedintohisroom,andhadnothinginhiscupboards.Heaskedifwecouldlethimhavethefoodontrust.Hepromisedtorepaymethenextday.

Icouldn’thelpstaringathim.Iwonderedwhatkindofpersonhehadbeentenortwentyyearsbefore,andwhathewouldbelikeifluckhadgonehisway.Ihadahurtinmyheartforthiskindofhumansoul,allaloneintheworld.ItoldhimthatIwassorry,andstorerulesdidn’tallowmetodoso.Ifeltstupidandunkindsayingthis,butIvaluedmyjob.

Justthen,anotherman,standingbehindthefirst,spokeup.Ifanything,helookedmorepitiable,“Chargeittome,”wasallhesaid.

WhatIhadbeenfeelingwaspity.Pityissoftandsafeandeasy.Compassion,ontheotherhand,iscaringinaction.Ithankedthesecondmanbuttoldhimthatwasnotallowedeither.ThenIreachedintomypocketandpaidforthebiscuitsmyself.Ireachedintomypocketbecausethesetwomenhadreachedintomyheartandtaughtmecompassion.