Jesus the Great High Priest
14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession. 15 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin.
16 Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
Hebrews 4:14-16

On Yom Kippur, one rabbi was allowed to enter that Holy of Holies and they tied a rope around him as if he was unworthy, he would be struck dead.

They were scared to do this. Nobody but very pure people would risk it.

Well due to Jesus, we can cross that threshold. Jesus is that veil and the Holy Spirit lives inside us now.

I hope that is more clear. The devout rabbis were terrified of that Spirit of GOD so it's amazing that it's inside us. We could never be worthy except through Jesus' perfect sacrifce once and for all time.