1 Thessalonians 4:3-8

For this is God’s will: that you become holy, that you keep away from sexual immorality,  that each of you know how to possess his own body in holiness and honor,  not in lustful passion like the Gentiles who do not know God.  In this matter no one should violate the rights of his brother or take advantage of him, because the Lord is the avenger in all these cases, as we also told you earlier and warned you solemnly.  For God did not call us to impurity but in holiness.  Consequently the one who rejects this is not rejecting human authority but God, who gives his Holy Spirit to you.

Self-discipline is part of a life that honors God. This victorious way of living is threatened daily by the worldly desires that war and rise up to claim our bodies for their own. Romans 12:1-2 (NIV) says, “Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship. Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.” That being said, self-discipline isn't led by our own efforts, it is led by our surrender and reliance upon the sufficiency of Christ Jesus. Believe that Jesus is enough – that His grace is always sufficient, and experience the freedom of a life made holy before God.