While physical training has some value, the benefits of godliness are unlimited, since it holds out promise not only for this life but also for the life to come.
Everyone who seeks a prize submits himself to rigorous self-discipline in every respect. They do so to win a perishable crown, while we seek an imperishable one.
Hence, as sin’s reign resulted in death, so the grace of God also might reign through righteousness resulting in eternal life through Jesus Christ our Lord.
Therefore, prepare your minds for action. Be calm and fix your hopes completely on the grace that you will be granted at the revelation of Jesus Christ.
At the time that discipline is received, it always seems painful rather than pleasant, but afterward it yields a harvest of peace and uprightness to those who have been trained by it.
All Scripture is inspired by God and is useful for teaching, for refutation, for correction, and for training in uprightness, so that the man of God may be proficient and equipped for good work of every kind.