He means that we initially built our faith and confidence in Jehovah, his promises, and his organization by feeding on God’s Word.
(‏ روما ١٠ :‏ ١٧‏ )‏ يعني ذلك اننا في البداية بنينا ايماننا وثقتنا بيهوه ووعوده وهيئته بالتغذي من كلمة الله .‏