Your body is an intelligent slave

Your body actually knows and can sense when it is being put under discipline by the force of your will (versus just random harsh circumstances). It actually starts responding differently. It starts to cleanse itself, it starts to give you energy from hidden reserves, and it starts controlling hormone responses… All by itself.

Your body is an intelligent slave to your soul. Take control:

Spiritually: fasting and prayer
Mentally: refusing lust and meditating on the word of God
Physically: work, exercise, and athletics