The first quality is islam ( showing submission to GOD ). when this word is mentioned right after iman the way it is here, then it signifies the external form of islam, ie. The physical entity of a person. Thus if the tongue of a person is willing to speak and abstain from speaking at the behest of GOD and his Prophet (SWS); if his ears are ready to hear and stop hearing at their bidding, if his hands are prepared to strike and restrain themselves at their command and if his feet are keen to walk and stop at their directive, then this is nothing but ISLAM. It is evident from the QURAN that the best examples of ISLAM are the Prophets themselves. Thus we have been directed to follow them to reach this position of submitting to GOD and being content and happy with his decisions.