Or HaChaim on Numbers 16:10/אור החיים על במדבר ט״ז:י׳

1 ויקרב אתך ואת כל אחיך בני לוי, "He has brought you close together with all your brethren the sons of Levi." What is the meaning of the הבדלה, separation, of which Moses spoke in the previous verse and the הקריבה, the bringing near, of which he speaks in our verse? Maybe Moses referred to two different levels of spiritual elevation. The הבדלה, is the lower level of elevation which all the members of the tribe of Levi participated in and which resulted in their elevation vis-a-vis עדת ישראל. The הקריבה referred to the special status conferred on the Kehatites, whose task of transporting the Holy Ark, etc. reflected their superior status even amongst the Levites. Moses used the word אתך, "especially you personally," indicating that all his brothers depended on Korach and looked up to him.