Only understand aright what obedience means. The renewed man has still the flesh, with its evil nature, out of which there arise involuntary evil thoughts and dispositions. These may be found in a truly obedient man. Obedience deals with the doing of what is known to be God's will, as taught by the Word, and the Holy Spirit, and conscience. Such obedience is an attainable degree of grace.
Obedience is possible.
This love is no vague sentiment, in man's imagination of something that exists in heaven, but a living, mighty power of God in the heart, working effectually according to His working, which worketh in us mightily. A life of obedience is possible. This obedience is of faith. By faith, Abraham obeyed. By faith the promises of the Covenant, the presence of the Surety of the Covenant, the hidden inworking of the Holy Spirit, and the love of God in His infinite desire and power to make true in us all His love and promises, must live in us.