The Christian life is a battle and a march. But the victory to be gained is not won by human power. The field of conflict is the domain of the heart. The battle which we have to fight—the greatest battle that was ever fought by man—is the surrender of self to the will of God, the yielding of the heart to the sovereignty of love. The old nature, born of blood and of the will of the flesh, can not inherit the kingdom of God. The hereditary tendencies, the former habits, must be given up.
He who determines to enter the spiritual kingdom will find that all the powers and passions of an unregenerate nature, backed by the forces of the kingdom of darkness, are arrayed against him. Selfishness and pride will make a stand against anything that would show them to be sinful. We can not, of ourselves, conquer the evil desires and habits that strive for the mastery. We can not overcome the mighty foe who holds us in his thrall. God alone can give us the victory. He desires us to have the mastery over ourselves, our own will and ways. But He can not work in us without our consent and cooperation. The divine Spirit works through the faculties and powers given to man. Our energies are required to cooperate with God.
The victory is not won without much earnest prayer, without the humbling of self at every step. Our will is not to be forced into cooperation with divine agencies, but it must be voluntarily submitted.—Thoughts from the Mount of Blessing, 142. WGD 26
We “do not cease to pray for you, and to desire that ye might be filled with the knowledge of His will in all wisdom and spiritual understanding; that ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God; strengthened with all might, according to His glorious power, unto all patience and long-suffering with joyfulness.” Colossians 1:9-11. MH 426
Wherefore, my beloved, as ye have always obeyed, ... work out your own salvation with fear and trembling. For it is God which worketh in you both to will and to do of His good pleasure. Philippians 2:12, 13, KJV