Adam Clarke's Commentary on the Bible

Verse 16 (Galatians 5:16)

Walk in the Spirit - Get back that Spirit of God which you have grieved and lost; take up that spiritual religion which you have abandoned.

Ye shall not fulfill the lust of the flesh - If the Spirit of God dwell in and rule your heart, the whole carnal mind will be destroyed; and then, not only carnal ordinances will be abandoned, but also the works and propensities of the flesh.

- Adam Clarke's Commentary on the Bible