Ephesians 5:11-15

11 Take no part in and have no fellowship with the fruitless deeds and enterprises of darkness, but instead [let your lives be so in contrast as to] expose and reprove and convict them.

12 For it is a shame even to speak of or mention the things that [such people] practice in secret.

    

13 But when anything is exposed and reproved by the light, it is made visible and clear; and where everything is visible and clear there is light.

We are now one with the Light, so all that is against our Father’s will is clearly exposed and made visible to us. The Light drives out the darkness and we are now free from all fellowship with it. The power of our Father keeps us safe and sound from all that would ever be able to harm us or keep us from being one with His glory. 

But you are a chosen race, a royal priesthood, a dedicated nation, [God's] own purchased, special people, that you may set forth the wonderful deeds and display the virtues and perfections of Him Who called you out of darkness into His marvelous light. 1 Peter 2:9

The powerful Truth for us that we are shown here is that our Father called us out of the darkness. Our Father knew who and what we were. He knew all that we would ever do before He created the world and He still called and chose us, Psalm 139:16. God alone has made us light, no work, no human effort, it was all a free gift and our once our Father gives a gift, He never takes it back, Romans 11:29.

14 Therefore He says, Awake, O sleeper, and arise from the dead, and Christ shall shine (make day dawn) upon you and give you light.

We know that our old (unrenewed) self was nailed to the cross with Him in order that [our] body [which is the instrument] of sin might be made ineffective and inactive for evil, that we might no longer be the slaves of sin. Romans 6:6

15 Look carefully then how you walk! Live purposefully and worthily and accurately, not as the unwise and witless, but as wise (sensible, intelligent people),

And I will put my Spirit within you and cause you to walk in My statutes, and you shall heed My ordinances and do them. Ezekiel 36:27

Because of Christ we cannot help but walk carefully, accurately, and purposefully! Our Shepherd will never leave us or forsake us and He will cause us to be more then conquerors through Him.