And every man that striveth for the mastery is temperate in all things. Now they do it to obtain a corruptible crown; but we an incorruptible. 1 Corinthians 9:25
The life of the apostle Paul was a constant conflict with self. He said, "I die daily" (! Corinthians 15:31). His will and his desire every day conflicted with duty and the will of God. Instead of following inclination, he did God's will, however crucifying to his nature.
At the close of his life of conflict, looking back over its struggles and triumphs, he could say, "I have fought a good fight, I have finished my course, I have kept the faith: henceforth there is laid up for me a crown of righteousness, which the Lord, the righteous Judge, shall give me at that day" (2 Timothy 4:7, 8).
The Christian life is a battle and a march. In this warfare there is no release; the effort must be continuous and persevering. It is by unceasing endeavor that we maintain the victory over the temptations of Satan. Christian integrity must be sought with resistless energy and maintained with a resolute fixedness of purpose.
No one will be borne upward without stern, persevering effort in his own behalf. All must engage in this warfare for themselves; no one else can fight our battles. Individually we are responsible for the issues of the struggle; though Noah, Job, and Daniel were in the land they could deliver neither son not daughter by their righteousness. (The Ministry of Healing, 452, 453)
Reflection: In this battle against our sinful nature we must never give up. We may fall, but we must get up and move forward by God's grace.