What does the Bible teach about spirituality?

Spirituality is the state of being filled by means of the Holy Spirit. It is an absolute condition; at any given moment, a believer is either one hundred percent filled by the Spirit and therefore spiritual, or not filled at all and therefore carnal (1 Cor. 3:1–4; Gal. 5:16–17; 6:1). This is distinct from indwelling, which is a once-for-all event occurring at salvation that cannot be changed or lost (Rom. 8:9; 1 Cor. 6:19–20; Gal. 3:2; 4:6).

Biblical spirituality is defined by a contrast between the energy of the Spirit and the energy of the flesh. To be spiritual is to be "in the Spirit," to walk in fellowship, and to walk by faith rather than by sight. Conversely, carnality is temporal death—a loss of fellowship caused by giving in to temptation and the old sin nature. While salvation is the once-for-all victory, spirituality is the ongoing victory. This state is maintained by obeying the command to be filled (Eph. 5:18) and is restored through confession after sin. The evidence of spirituality is the production of divine fruit and a progressive conformity to Jesus Christ, which cannot be achieved through human energy or external piety.