Chasidut do Rodzaju 17:4

Genesis ‎17,4., “I, here My covenant is with you; you will become ‎‎(founder) of a multitude of nations.” The principal task of the ‎‎tzaddik’s service of the Lord is to ascend spiritually to ‎higher levels, so that the entire human race residing in the ‎‎“lower” part of the universe is elevated. The Zohar ‎expressed this by writing: “we need to be able to make an ‎appearance, facing the King.” It is clear that there is a danger that ‎when the tzaddik, (Avraham) in order to fulfill the mission ‎of founding numerous nations, has to descend to the ‎moral/ethical level of these people in order to subsequently ‎elevate them, he faces the danger of becoming submerged among ‎them instead. Avraham was keenly aware of that. Here G’d assures ‎him that He will protect him against these dangers as His ‎covenant will accompany Avraham all the way when he ‎undertakes “outreach.”‎