Desires of the Spirit

"Paul wrote this in his letter to the Galatians 5:13 "For you were called to freedom, brothers. Only do not use your freedom as an opportunity for the flesh, but through love serve one another." What happens when we try to clean up the flesh? We try to do it by human effort, but Paul reminds us to "walk by the Spirit, and you will not gratify the desires of the flesh". * Are we supposed to feel the Holy Spirit within us? * Was David saying that the angel's food is meat? Or is he talking about manna and corn, as in Psalm 78:24? * ​What does a wife do if her born again husband is uncomfortable leading spiritually? * Will two Christians - one living piously and the other lazily - have the exact same reward in heaven ... or the same degree of Paradise?