"As the highest preparation for your work I point you to the words, the life, the methods, of the Prince of teachers. I bid you consider Him. Here is your true ideal. Behold it, dwell upon it, until the Spirit of the divine Teacher shall take possession of your heart and life. “Reflecting as a mirror the glory of the Lord,” you will be “transformed into the same image.” 2 Corinthians 3:18 , R.V.— Education, 282 . CT 18.1"
"But we all, with open face beholding as in a glass the glory of the Lord, are changed into the same image from glory to glory, even as by the Spirit of the Lord."
Ellen White directly references 2 Corinthians 3:18 in this passage.