Blessings in the Mighty Name of Yeshua Hamashiach!
Self-discipline is essentially the same as self-control, one of the nine fruits of the Spirit listed by Paul in Galatians 5:22-23. The KJV translation uses the word temperance in place of “self-control” which, like self-discipline, generally refers to our ability to control or restrain ourselves from all kinds of feelings, impulses, and desires, which includes the desire for physical and material comfort. Now, even though self-control is the last of the spiritual fruits mentioned by Paul, and even though it is a term not used extensively in the Bible, self-control is clearly an indispensable attribute of the Christian life, especially as our unredeemed flesh sometimes causes us to succumb to the persistent tug of our sinful desires.
It is important to understand that self-control is a work of the Holy Spirit, not a work of the individual. After all, Galatians 5:22-23 lists the fruit of the Spirit, not the fruit of the Christian. As we are merely the branches upon which the Vine (Christ) hangs the fruit He produces (John 15:1-8), it is the indwelling presence of the Holy Spirit that gives Christians the power and ability to exercise self-control so that we will not be mastered by the “cravings of sinful man.” As Paul said, “God did not give us a Spirit of timidity, but a Spirit of power, of love and of self-discipline” (2 Timothy 1:7). Indeed, Christians are controlled not by the sinful nature, but by the Holy Spirit (Romans 8:9), who helps us in our weakness (v.26), which makes us able to say “no” to sin.
Shalom
Pastor Williams