Ephesians 5:13 - Matthew Poole's English Annotations on the Holy Bible

But all things; or all those things, viz. those unfruitful works of darkness, which are to be reproved. Are made manifest; i.e. in the minds and consciences of the sinners themselves. By the light; the light of doctrine in verbal reproofs, and of a holy life in real and practical ones. For whatsoever doth make manifest is light; or, it is the light which manifests every thing, viz. which was before in the dark. The apostle argues from the nature and office of light; q.d. It is the property of light to discover and manifest what before was not seen, and therefore it becomes you who are light in the Lord to shine as lights in the world, Philippians 2:15, that ye may by your holy conversation convince wicked men of their wickedness, and deeds of darkness, which they did not before perceive in themselves.