Look ... upon me - opposed to hiding or averting the face (compare Psa 25:15; Psa 86:6; Psa 102:17).
as thou usest to do - or, “as it is right in regard to those who love Thy name.” Such have a right to the manifestations of God’s grace, resting on the nature of God as faithful to His promise to such, not on their own merits.