First Thessalonians 2:12 tells us that God calls us into His own kingdom and glory. This is a calling into 1) the present spiritual reality, 2) the openly manifested kingdom and glory in the coming age, and 3) New Jerusalem as the eternal kingdom and glory.
Ephesians 4:1 exhorts us “to walk worthily of the calling with which you were called.” This is our current walk with the inward ruling of the kingdom (Rom. 14:17) and the ongoing transformation into the glory of the Lord (2 Cor. 3:18).
Ephesians 4:4 says “you were called in one hope of your calling.” This unique hope is Christ—“Christ in you, the hope of glory” (Col. 1:27). The hope of our calling is the glorious Christ in His kingdom and in New Jerusalem.
This glorious Christ was first seen (briefly) by three disciples. In Matthew 16:28–17:2 we read, “There are some of those standing here who shall by no means taste death until they see the Son of Man coming in His kingdom. And after six days Jesus took with Him Peter and James and John his brother, and brought them up to a high mountain privately. And He was transfigured before them, and His face shone like the sun, and His garments became as white as the light.” In these verses seeing the kingdom is promised and the Lord’s glory is revealed; the two stand together.
When the Lord returns visibly, that will bring in the manifestation of His kingdom and glory. At that time His glory will not only be outward. It will be revealed from within us. This will be His coming “to be glorified in His saints” (2 Thes. 1:10) and to “transfigure the body of our humiliation to be conformed to the body of His glory” (Phil. 3:21).
Ultimately the kingdom and glory are Christ shining gloriously through His people and exercising authority through His people in New Jerusalem.