Full of holiness
The second thing which we may here understand by light is holiness. While you seek God in all things, you shall find him in all, the fountain of all holiness, continually filling you with his own likeness, with justice, mercy, and truth. While you look to Jesus and him alone, you shall be filled with the mind that was in him (Philippians 2:5). Your soul shall be renewed day by day after the image of him who created it (Colossians 3:10). If the eye of your mind is not removed from him, if you endure seeing him who is invisible (Hebrews 11:27), and seeking nothing else in heaven or earth, then as you behold the glory of the Lord you shall be transformed into the same image, from glory to glory, by the Spirit of the Lord (2 Corinthians 3:18).
1771 text
4. The second thing which we may here understand by light, is holiness. While thou seeketh God in all things, thou shalt find him in all, the fountain of all holiness, continually filling thee with his own likeness, with justice, mercy and truth. While thou lookest unto Jesus and him alone, thou shalt be filled with the mind that was in him. Thy soul shall be renewed day by day, after the image of him that created it. If the eye of thy mind be not removed from him, if thou endurest seeing him that is invisible, and seeking nothing else in heaven or earth, then as thou beholdest the glory of the Lord, thou shalt be transformed into the same image, from glory to glory, by the Spirit of the Lord.