God's working with His people involves promises. He makes covenants with us according to His eternal purpose. These covenants are given to accomplish His will and to give to us assurance in the days of our sojourning here that God is absolutely guiding and governing His creation to fulfill His perfect will. There is never any need for us to fret or worry over anything, for God is accomplishing His purposes in, for and through us. The Old Covenant involves works and perpetual sacrifices, for the conditions of the Law were impossible for us; the new, however, completely fulfills the righteousness of God in Christ.