Which is synonymous with having your eyes open, to see the truth of who God is, who you are and the real reason you exist. It also means seeing evil clearly in the light of the truth, seeing the devil, the world and your own sinful impulses for what they are, and therefore working with God (or rather God working in you) so that your true self, which is in His perfect likeness, can be revealed (1 Corinthians 1:7).
