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 NKJV 

Spiritually speaking, there are two kingdoms in the universe, i.e., the Kingdom of God and the Kingdom of Darkness. Both kingdoms have a realm, rule, reign and dominion—one of light and the other of darkness. The Kingdom of God is ruled by Jesus of Nazareth and the Kingdom of Darkness is ruled by Satan, whom Jesus called the prince of this world and whom Paul called the prince of the power of the air (John 12:31; Eph. 2:2). A king, without question, is greater than a prince.

The Kingdom of God is a kingdom of light that changes and transforms lives, but the Kingdom of Darkness blinds, binds, and destroys lives. But those who know Jesus as Lord, Savior and King have been brought out of darkness into the marvelous light. When God calls you out of darkness and delivers you, He doesn’t leave you (Heb. 13:5); He brings you to Himself and to His kingdom (Ex. 19:4, 6; Col. 1:12, 13). God calls you from death to life; from unrighteousness to righteousness; from sorrow and sadness to joy; from turmoil and confusion to peace; from ignorance to understanding; from hopelessness to hope; and, from limitation to a kingdom where all things are possible.

As a result of this spiritual transformation, believers are admonished to walk in the light and to live in the day (1 Thess. 5:5), and to have no fellowship with the unfruitful works of darkness (Eph. 5:8-13). After all, if you’re living in the “night”, you’re not walking in the light (1 John 1:7). So, let your light shine to overcome darkness and for others to see your good works and give God the glory (Matt. 5:16). You are chosen, kingly in nature, separated unto God; you are God’s special treasure who should proclaim His praises because you have been called out of darkness!