Lemme fix Hebrews 12 for ya....
There are 6 entities described here. 5 are invisible but 1 is visible. The visible entity is "come" unto the invisible entities. The church is now considered connected to the invisible kingdom and its entities.
22 But ye are come unto mount Sion,
(#1-invisible) and unto the city of the living God, the heavenly Jerusalem,
(#2-invisible) and to an innumerable company of angels,
(#3-invisible)
23 To the general assembly and church of the firstborn, which are written in heaven,
(#4-visible) and to God the Judge of all,
(#5-invisible) and to the spirits of just men made perfect,
(#6-invisible)
That what Jesus was speaking of concerning the man seeing or entering into the kingdom of God(visible entering into invisible, rubbing shoulders with these multiple invisible entities)....
3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot
see the kingdom of God.
4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother's womb, and be born?
5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot
enter into the kingdom of God.