View of the Throne in the Old vs New Covenants
I am using 2 Corinthians 3 to show the comparison that Paul made betweeen the Old and New testaments in order to show that God who revealed Himself to Moses face to face (by bringing His throne down to Sinai) still wants to reveal Himself to us face to face by bringing us into His presence/into His throne room. Israel lived near the glory, but the glory was not in them. For that matter, they could not even bear to look upon the glory of God that was revealed in Moses. Their own spirits were vailed or blinded so that they could not see the glory of God or experience it personally (2 Cor 3:14-16).
In fact, they were so close to the glory (at the foot of the mountain) but they could not be bothered by the glory that was taking place in Sinai where Moses fellowshipped with God because they were far from God. They preferred to believe that Moses was not returning (maybe by day 23 or so) and that God was no longer close, so they asked Aaron to make a golden calf for them to worship (Ex 32: 1-8).
  • These are the believers who have a form of godliness but deny the power thereof and the ones who worship to please men and get their attention. No Moses, no Jehovah for them. You can’t trust them out of your eyesight.
  • These are the ones who come to church (knowing not who they worship) and join the church as if they are joining a club (to fulfill their hidden agendas).
  • These are the ones who sit in services, in the presence of the Lord and receive no transformation.
The vail of spiritual blindness must be removed
Now Paul said that the vail would be removed when Israel turns to the Lord (that is why He raised up the United States to take their place, although all those who believe are grafted in as spiritual Israelites according to Romans 11. more on that revelation later). In verse 6 of 2 Cor 3, Paul said that the Spirit of the Lord is the one who brings the new testament to life. The ministration of the Spirit is glorious (v 8) and we need His spirit to remove vails or spiritual blindness. Isn’t He the one who dwells in us to teach us all things and bring us into divine truth or revelation?
Paul says that by the Spirit the vail has been removed from our faces (when the vail in the temple was torn from top to bottom) so that we can see God clearly, face to face, like Moses did. Paul paints a picture in 2 Cor 3:18 of the believer gazing into the glory of the Lord like someone who is looking into a mirror. Now this interesting because someone looking into a mirror is supposed to see him or herself (at least in human understanding). Paul knew what he was talking about because of his experience on the road to Damascus because the glory of the revealed Lord Jesus was so bright that it blinded him (Acts 9:1-8).

When Paul arose from the revelation (vision), his eyes were open but he could not see. This is the picture of the individual who is spiritually blind and of the believer who has no revelation knowledge because the eyes of the understanding are darkened or blinded. The latter is possible because Paul prayed in Ephesians 1: 17, 18 for believers to receive spiritual vision. God wants to reveal Himself when we look at Him.
Isaiah’s   experience of the Throne also brought transformation

Isaiah said that he saw the Lord’s throne high and lifted up (Isa 6:1). What he saw of himself was a man of unclean lips. This recognition began his transformation or sanctification when the fire (of the Spirit) was applied to his lips from the coals on the altar to purge him. I believe this fire on the altar is equivalent to the purifying fire of the Holy Spirit who presents himself in Revelation 4: 5 as “seven lamps of fire burning before the throne. He rested on the disciples as cloven tongues of fire in Acts 2. In the presence of the throne, Isaiah also was able to hear the voice of the Lord calling for a messenger and respond immediately to the call.
This is the nature of the transformation that believers need in all eras and the transformation that changes us into His image from glory to glory (2 Cor 3:18). Mind you, this is not the only transformation that is experienced by the worshipper. Paul got a revelation which transformed him from into an unbeliever to a believer, a revelation which caused him to become baptized with the fire of the Spirit and a transformation which changed a radical hard core Pharisee into a radical minister of the Gospel. His glory to glory took place later when he received further revelation of which he said that he was
“caught up to the third heaven…whether in or out of the body, I cannot tell…how that he was caught up into paradise and heard unspeakable words which it is not lawful for a man to utter… and lest i should be exalted above measure through the abundance of the revelations…” (2 Cor 12: 1-10).
Apostle Peter and the Throne
Apostle Peter got a transformation by spiritual revelation through a vision in which a sheet descended from the throne room (Acts 10). This revelation changed him from a scornful believer of Jewish origins into one who could accept people of other nations as his brethren. This was necessary because God said that Jesus the seed of Abraham would bless all nations. More to come on the importance of being a worshipper.
God bless.