How do we know walking in the Spirit is essential?

According to Romans 8:6, to be spiritually minded is life and peace, highlighting the critical importance of walking in the Spirit. Paul contrasts this with being carnally minded, which results in death—both physical and spiritual. Therefore, walking in the Spirit not only evidences one's relationship with Christ but also ensures a life marked by peace and eternal hope. This spiritual pursuit reflects a believer's transformation and ongoing reliance on the Holy Spirit, who empowers them to live in a way that is pleasing to God.