Goodness is the simple word for the general quality recognized in character or conduct. Without goodness, trust disappears. It is important for the harmony with other people and with the inner self. Islam focuses on good character along with other acts of worship.
It is reported that Ali b. Abi Talib, May Allah be pleased with him said:
"Goodness is not in your wealth and your offspring being plentiful, but true goodness is when your good deeds are abundant and you have a great understanding and forbearance, and when you compete to worship your Lord. If you do good deeds you praise Allah and thank Him, and if you sin you beg Allah’s forgiveness."
It must be noted that an act of goodness is much dear to Allah than one's wealth and riches. Goodness comes from good Akhlaq which means the practice of virtue, morality and good manners. Good Akhlaq is the core of worshipping Allah. There are numerous hadith and verses in Quran that point out the importance of Akhlaq in a Muslim.
“Whoso does good, it is for himself and who does evil, it is against it and your Lord is not an unjust to His servants.” [Surah Fussilat: 46]
"There is no good in this life except with two types of people. The first being a person who sins but then corrects himself through repentance, and the second best the person who strives and hastens to get the good of the hereafter before their death." [Ibn Asakir, Al-Tawbah article 13]
“The best blessing a man has been given is good Akhlaq.” [Prophet Muhammad(saw)]
“The best of those who have Iman are those who have best Akhlaq” [Prophet Muhammad(saw)]
“The one who has the better Akhlaq is the one who is more beloved to Allah سبحانه و تعالى.” [Prophet Muhammad(saw)]
“Allah سبحانه و تعالى hates those who are foul-mouthed.”[Prophet Muhammad(saw)]
“The most severe people on the Day of Judgement of punishment are those who people used to avoid because of their evil.” [Prophet Muhammad(saw)] (Scholars say this mean bad Akhlaq)
“That you worship Allah as if you see Him, and if you do not see Him, He sees you" [Prophet Muhammad(saw)]
“The heaviest things on the Day of Judgement will be good Akhlaq.” [Prophet Muhammad(saw)]
“When one person curses you or points out a fault in you which you feel you don’t have, they do not curse him back and do not point out a fault that he does have because if you do so then the sin will be upon him, not you.”[Prophet Muhammad(saw)]
It remains beyond doubt that all these hadith point out the importance of good manners in Islam. For every Muslim, it is an obligatory duty to amend his behavior towards his fellows in order to be closer to Allah. A bad-mannered person is hated by people and loathed by Allah. There is no place for such a person in Jannah. May Allah protect us. One's good character and good Akhlaq are the reasons that take him closer to Jannah. Good Akhlaq also includes the sincerity, honesty, and truthfulness in doing the acts of worship like Charity,Salah, Quran recitation, Tawbah. we should approach Allah with beautiful etiquettes for Allah loves the one with good conduct.
May Allah guide us and forgive us.