[K:JNWTS 26/1 (May): 30]
"The law makes promises on an impossible condition of doing because it binds fulfillment of the promises to our strengthif you will do it (Phil. 1, 2; Heb. 2, 3; 1 Thess. 5; John 6; Eph. 1, 2). The condition of the gospel (if you believe) is just as impossible for us as that of the law. For God, however, who by grace forms faith in us through the Holy Spirit for the sake of Christ, it is possible, since He who commands, who lays down the condition, likewise will effect it, and grace will work from both sides. The law, however, only commands, but does not act from both sides (Augustine, [Books] 3, 5, 7)" (as found in James T. Dennison, Jr., Reformed Confessions of the 16th and 17th Centuries in English Translation: 1552-1566 (2010) 2:471-72).