Sanctification is a daily work. Let none deceive themselves with the belief that God will pardon and bless them while they are trampling upon one of His requirements. The willful commission of a known sin silences the witnessing voice of the Spirit, and separates the soul from God. Whatever may be the ecstasies of religious feeling, Jesus cannot abide in the heart that disregards the divine law. God will honor those only who honor Him. MYP 114.2
“To whom ye yield yourselves servants to obey, his servants ye are to whom ye obey.” If we indulge anger, lust, covetousness, hatred, selfishness, or any other sin, we become servants of sin. “No man can serve two masters.” If we serve sin, we cannot serve Christ. The Christian will feel the promptings of sin, for the flesh lusteth against the Spirit; but the Spirit striveth against the flesh, keeping up a constant warfare. Here is where Christ's help is needed. Human weakness becomes united to divine strength, and faith exclaims, “Thanks be to God, which giveth us the victory through our Lord Jesus Christ!” MYP 114.3
If we would develop a character which God can accept, we must form correct habits in our religious life. Daily prayer is as essential to growth in grace, and even to spiritual life itself, as is temporal food to physical well-being. We should accustom ourselves to often lift the thoughts to God in prayer. If the mind wanders, we must bring it back; by persevering effort, habit will finally make it easy. We cannot for one moment separate ourselves from Christ with safety. We may have His presence to attend us at every step, but only by observing the conditions which He has Himself laid down. MYP 114.4