Romans 8:7

8:7 because the outlook of the flesh is hostile to God, for it does not submit to the law of God, nor is it able to do so.

Romans 14:5

14:5 One person regards one day holier than other days, and another regards them all alike. Each must be fully convinced in his own mind.

Romans 8:5

8:5 For those who live according to the flesh have their outlook shaped by the things of the flesh, but those who live according to the Spirit have their outlook shaped by the things of the Spirit.