John Cassian
Patristic
c. A.D. 360–435
“For Holy Scripture supports the freedom of the will where it says: "Keep thy heart with all diligence," but the Apostle indicates its weakness by saying "The Lord keep your hearts and minds in Christ Jesus." David asserts the power of free will, where he says "I have inclined my heart to do Thy righteous acts," but the same man in like manner teaches us its weakness, by praying and saying, "Incline my heart unto Thy testimonies and not to covetousness:" Solomon also: "The Lord incline our hearts unto Himself that we may walk in all His ways and keep His commandments, and ordinances and judgments."”