According to the book Teaching the Reformation, Cellarius believed that true understanding results “from the assiduous reading of Scripture, from frequent comparison of Scripture with itself, and from prayer joined with repentance. ”
Menurut buku Teaching the Reformation, Cellarius yakin bahwa pemahaman yang benar bisa diperoleh jika seseorang rajin membaca Alkitab, sering membandingkan ayat - ayat Alkitab, dan berdoa serta bertobat.