Man's Good Works

"Fallen man's many good works, even though in accord with God's commands, are not well pleasing to God when weighed against His ultimate criteria and standard of perfection. The love of God and His law is not the unbelievers' deepest animating motive and principle (nor is it his motive at all), so it does not earn him the right to redemptive blessings from a holy God. The Scripture clearly implies this when it states "...without faith it is impossible to please Him." (Hebrews 11:6a, NASB) and "whatever is not from faith is sin." (Romans 14:23)"                                           
           -   from monergism.com