Galatians 5:18 – 25
But if you are led by the Spirit you are not under the law. Now the works of the flesh are plain: fornication, impurity, licentiousness, idolatry, sorcery, enmity, strife, jealousy, anger, selfishness, dissension, party spirit, envy, drunkenness, carousing, and the like. I warn you, as I warned you before, that those who do such things shall not inherit the kingdom of God. But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such there is no law. And those who belong to Christ Jesus have crucified the flesh with its passions and desires. If we live by the Spirit, let us also walk by the Spirit.
Homily:
The flesh wants immediate gratification. It is a wasting asset.
The spirit wants delayed gratification. It is an enduring asset.
The trick with mastering the flesh is framing delayed gratification as immediate gratification. Reward yourself for delaying gratification. The flesh likes rewards and promotes endeavours that reward it. Use that knowledge to master it.