- Home
- Speakers
- Theodore Epp
- Keep The Armor On!
Theodore Epp

Theodore H. Epp (January 27, 1907–October 13, 1985) was an American Christian preacher, radio evangelist, and author, best known as the founding director of Back to the Bible, a globally influential radio ministry. Born in Oraibi, Arizona, to Russian Mennonite immigrant missionaries working with the Hopi Indians, Epp grew up in a faith-filled environment. Converted at age 20 in 1927 under Norman B. Harrison’s teaching in Flagstaff, Arizona, he pursued theological education at Oklahoma Bible Academy, Hesston College in Kansas, and the Bible Institute of Los Angeles (now Biola University), earning a Th.M. from Southwestern Baptist Theological Seminary in Fort Worth, Texas, in 1932. Epp’s preaching career began as a pastor in Goltry, Oklahoma, at Zoar Mennonite Church (1932–1936), where he married Matilda Schmidt in 1930, raising six children—Gerald (who died young), Eleanor, Herbert, Bernice, Marilyn, and Virginia. In 1936, he joined T. Myron Webb’s radio ministry, and on May 1, 1939, launched Back to the Bible in Lincoln, Nebraska, with just $65, trusting God for provision. The program grew from a 15-minute local broadcast to a daily 30-minute show on over 800 stations worldwide in eight languages by his 1985 retirement, featuring his expository preaching and music from the Back to the Bible choir and quartet. He authored nearly 70 books, including David: A Man After the Heart of God and Practical Studies in Revelation, emphasizing practical faith and biblical literacy.
Download
Sermon Summary
Theodore Epp emphasizes the necessity of keeping the armor of God on at all times, as it represents an attitude of faith that must be actively chosen and maintained. He explains that as believers grow, they may identify weaknesses in their faith, which can be strengthened through the study of God's Word. Epp draws parallels between putting on the armor of God and putting on the Lord Jesus Christ, highlighting that true victory comes from Christ and His teachings. He encourages believers to engage with the Scriptures to embody the new man created in righteousness and holiness. Ultimately, the armor is not just protective gear but the very essence of Jesus Christ in the believer's life.
Keep the Armor On!
Ephesians 6:10-18 The armor is not to be put on and taken off periodically but to be put on and left on. The armor is actually an attitude of faith; therefore, it is something that is put on by an act of the will and left on. As we mature in the Christian life, we will discover areas in our lives where our faith is not as strong as it should be; that is, the armor is weak in a certain place. At such a time, our responsibility is to go to the Word of God to study His promises concerning our area of weakness so that our faith will be strengthened. Notice the parallel between Ephesians 6:11, "Put on the whole armour of God," and Romans 13:14, "Put ye on the Lord Jesus Christ." God's provision for victory is in the Person of the Lord Jesus Christ and through the Word of God. In putting on the Lord Jesus Christ, we need to remember that the living Word (Jesus Christ) is revealed through the written Word (the Bible). In His prayer for His own, Jesus prayed, "Sanctify them through thy truth: thy word is truth" (John 17:17). We put on the Lord Jesus Christ as we study the Word of God and obey what it says. The believer's armor, then, is not physical protective equipment but is Jesus Christ Himself. Putting on Christ is similar to what we are told in Ephesians 4:24: "Put on the new man." This new man is Christ formed in the believer. Paul was greatly concerned that this be true of every believer, and he told the Galatians: "I travail in birth again until Christ be formed in you" (4:19). "And that ye put on the new man, which after God is created in righteousness and true holiness" (Eph. 4:24).
- Bio
- Summary
- Transcript
- Download

Theodore H. Epp (January 27, 1907–October 13, 1985) was an American Christian preacher, radio evangelist, and author, best known as the founding director of Back to the Bible, a globally influential radio ministry. Born in Oraibi, Arizona, to Russian Mennonite immigrant missionaries working with the Hopi Indians, Epp grew up in a faith-filled environment. Converted at age 20 in 1927 under Norman B. Harrison’s teaching in Flagstaff, Arizona, he pursued theological education at Oklahoma Bible Academy, Hesston College in Kansas, and the Bible Institute of Los Angeles (now Biola University), earning a Th.M. from Southwestern Baptist Theological Seminary in Fort Worth, Texas, in 1932. Epp’s preaching career began as a pastor in Goltry, Oklahoma, at Zoar Mennonite Church (1932–1936), where he married Matilda Schmidt in 1930, raising six children—Gerald (who died young), Eleanor, Herbert, Bernice, Marilyn, and Virginia. In 1936, he joined T. Myron Webb’s radio ministry, and on May 1, 1939, launched Back to the Bible in Lincoln, Nebraska, with just $65, trusting God for provision. The program grew from a 15-minute local broadcast to a daily 30-minute show on over 800 stations worldwide in eight languages by his 1985 retirement, featuring his expository preaching and music from the Back to the Bible choir and quartet. He authored nearly 70 books, including David: A Man After the Heart of God and Practical Studies in Revelation, emphasizing practical faith and biblical literacy.