Make your calling sure and your election definite. Then you will not fall into doubt and fear that God's promises are not yours. Strive to have the confidence of being God's child by walking in the way He set before you, and He will, by His Word, assure you that you were eternally chosen as one of His elect. The day that man fell into sin and became a citizen of Satan's kingdom of darkness, God assured us of being lifted up and out of the devil's kingdom to become citizens in the Kingdom of Light. Although today the human race is divided into different nations, tongues, and tribes, from a spiritual point of view there are only two kinds of people.
Scripture calls the world, and the other kind has the name of church.
Well, as John points out, the possession of faith reveals membership in the Kingdom of Light, and that we are no longer citizens in the Kingdom of Darkness. As members of that Kingdom of Light we have the victory over the Kingdom of Darkness whose king, Satan, goes against us. We become citizens of the Kingdom of Light by a rebirth. And we have undeniable evidence of belonging to it. The works which we perform do not earn it, or give it to us.