bible.com/bible/100/eph.3.20-21.NASB1995

Spiritual power is a mark of every Christian who submits to God’s Word and Spirit. It is not reserved for some special class of Christian, but for all those who discipline their minds and spirits to study the Word, understand it, and live by it. Although the outer, physical person becomes weaker with age (cf. 2Co 4:16), the inner, spiritual person should grow stronger through the Holy Spirit, who will energize, revitalize, and empower the obedient, committed Christian (cf. Ac 1:8; Ro 8:5–9, 13; Gal 5:16).