I believe in levels of Heaven. If you follow all the commandments of God and believe in Him, you would have earned the privilege of living in His presence in the eternities (Celestial Kingdom - compared to the glory of the sun). If you believed in Jesus Christ and did your best to follow Him and all His teachings, then you would be worthy to be in His presence. But since you did not follow all the commandments of the Father, you would earn the 2nd kingdom (Terrestrial Kingdom - compared to the glory of the moon). If you denied Jesus Christ but did not deny the Holy Ghost, you would earn the 3rd kingdom (Telestial Kingdom - compared to the glory of the stars).<quoted text>That is why you believe Christians from all denominations will go to heaven? What about the nation of Israel that deny Jesus is the messiah?
John mentions a vision of seeing the 3rd heaven and says even it is more glorious than he thought he could achieve. 2 Corinthians 12:2
The kingdoms are mentioned starting in 1 Corinthians 15:40.