Assalam alaykum, Adab or Good Manners combines 2 qualities:- Khayr (goodness) and doing what is preferred in action and speech. In this regards, Sayyadi Yusuf Ibn al-Husayn al-Marazi, may Allah be pleased with him, said:-- "By Adab you understand knowledge, and knowledge corrects actions; with action you obtain hikmah (wisdom), and with hikmah you obtain Zuhd; with zuhd you leave the world, and by leaving the world you desire the akhirah; with the desire for the akhirah you obtain the pleasure of Allah, the Mighty and Majestic." May we be blessed with positive Adab.. ameen. For further reading on this, see Sheikh Abdulqadir al-Jayli's "The Student and The Way of Spiritual Travel".