"But you are a chosen generation, a royal priesthood, a holy nation, His own special people, that you may proclaim the praises of Him who called you out of darkness into His marvelous light" (1 Peter 2:9)
The Bible lets us know that God is "Light" and the "Father of lights"; therefore, we're children of Light, dwelling in the light. That's why we read in the latter part of our opening text above. We've been brought into God's marvelous light-- that's your location in the realm of the spirit. You live in His awe-inspiring light. Therefore, there's no darkness in your life.
This brings to mind the words of Jesus in John 8:12:
"...I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life."
We have, and must walk in the same light in which God dwells and functions. This means that we're to walk in His Word, for His Word is light (Psalm 119:105)! Walking in His light means that your mindset and perceptions are as a result of the Word; you view and live your life only from the perspective of the Word.
God's Word should be the only light by which, and with which you see. Under that light, you see only possibilities and victories; you see the glory of God; and because you see it, you talk and walk accordingly. When you agree with what the Word says about you, and then affirm accordingly, you're walking in God's light. God gave you His Word to light up your path, so there wouldn't be darkness or uncertainties as you journey through life.
"Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: Who hath delivered us from the power of darkness, and hath translated us into the kingdom of His dear Son."
You've been brought out of darkness, and translated into the Kingdom of God's love-Son, where there's no darkness, sin, death, or evil and corrupting influences as is in the world. You've been catapulted to the gracious and glorious liberty of the sons of God. See and live from that realm-- it's the realm of victory, dominion, peace, and joy everlasting.
Blessed be God! He brought me out of darkness, and the miry clay, and set my feet upon the Rock to stay. That Rock holds me firm and fortified against the pressures and adversities of life. I dwell in the light wherein there's no darkness or pain, but victory, dominion, and glory forever, in Jesus' Name. Amen.
Further Study: Colossians 1:12-13; Proverbs 4:18; Isaiah 60:1-3