Good manners lead to prosperity, while bad ones lead to misery.
In a hadith, the Prophet (Blessings and Peace be upon him) said: “Through good manners, one reaches the status of the person who not only fasts, but who also stands late in the night to pray. “He (bpuh) also said:
“Shall I not inform you of the most beloved to me and the one seated closest to me on the Day of Resurrection: `Those of you who are best in manners.”‘
And verily, you [O’ Muhammad] are on an exalted standard of character. (Qur ‘an 68: 4)
And by the Mercy of Allah, you dealt with them gently. And had you been severe and harsh-hearted, they would have broken away from about you… (Qur’an 3: 159)
… And speak well to people… (Qur’an 2: 83)
‘Aa’ishah (may Allah be pleased with her) described the Prophet (bpuh) with the following words:
“His character was the Qur’an.”