Repentance: Cleaning the Slate
[9:11] If they repent and observe the Contact Prayers (Salat) and give the obligatory charity (Zakat), then they are your brethren in religion. We thus explain the revelations for people who know.
[9:12] If they violate their oaths after pledging to keep their covenants, and attack your religion, you may fight the leaders of paganism—you are no longer bound by your covenant with them—that they may refrain.
[9:13] Would you not fight people who violated their treaties, tried to banish the messenger, and they are the ones who started the war in the first place? Are you afraid of them? GOD is the One you are supposed to fear, if you are believers.
[9:14] You shall fight them, for GOD will punish them at your hands, humiliate them, grant you victory over them, and cool the chests of the believers.
[9:15] He will also remove the rage from the believers’ hearts. GOD redeems whomever He wills. GOD is Omniscient, Most Wise.
Repentance cleans the slate yet most people refuse to say sorry. They refuse to admit they did something wrong to other or to their own souls
http://www.dailymotion.com/video/x1evo1s_louis-ck-say-you-re-sorry_fun