The mind governed by the flesh is death, but the mind governed by the Spirit is life and peace.
Read Romans 8:6 Using Other Translations
For to be carnally minded is death; but to be spiritually minded is life and peace.
For to set the mind on the flesh is death, but to set the mind on the Spirit is life and peace.
So letting your sinful nature control your mind leads to death. But letting the Spirit control your mind leads to life and peace.
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(New International Version Bible Online)