Exposition of the Canons, Fifth Head of Doctrine, Of the Perseverance of the Saints: Article 4 (3)

That God deals righteously even then, when the actuating and influencing operation of His grace is such that it "permits" the saints to deviate from the guidance of grace and to be seduced into sin, so that they comply with the lusts of the flesh and actually fall, implies, in the first place, that the falls of the saints are not to be ascribed to the Lord God. On the contrary, the sins of the saints spring forth from their own sinful flesh and from their own carnal lusts and from the attacks...