The Book of Hebrews was written to Jewish believers. This book gives a comparison between a priest entering into the Holy of Holies, behind the veil, on behalf of the people, and the death of Jesus making it possible for each believer to have direct access to God. When Jesus died on the cross, one of the powerful and awesome things that happened was the veil of the temple was torn from top to bottom. Matthew 27:51 states, "And behold, the veil of the temple was torn in two..." The context of this chapter is the crucifixion.
Before this monumental event the temple had a veil that only the priest could go behind. Ever since that day of crucifixion, however, each and every believer has had direct access to God. "For we do not have a high priest who cannot sympathize with our weaknesses, but one who has been tempted in all things as we are, yet without sin." ( Hebrews 4:15) Jesus is now sitting at the right hand of God, in heaven, where we can "draw near with confidence to the throne of grace, that we may receive mercy and may find grace to help in time of need." (4:16)
Imagine that! People who have put their faith and trust in Jesus Christ can now approach the throne of God directly. We no longer need to go through a priest. The cross made it possible to go from the veil of the temple to the throne of grace.
This book has more details to add to this astounding doctrine! Here is what is said in 7:25-27. "Hence, also, He is able to save forever those who draw near to God through Him, since He always lives to make intercession for them. For it was fitting that we should have such a high priest, holy, innocent, undefiled, separated from sinners and exalted above the heavens; who does not need daily, like those high priests, to offer up sacrifices, first for His own sins, and then for the sins of the people, because this He did once for all when He offered up Himself."
Christ's death was the permanent sacrifice for our sins, making it unnecessary for a human priest to make sacrifices again and again. "For by one offering He has perfected for all time those who are sanctified." (10:14) Jesus, through His own blood, "entered the holy place once for all, having obtained eternal redemption."
Because of all of this "we have confidence to enter the holy place by the blood of Jesus." (10;19)
All of this was made possible by the death of Jesus on the cross. You can now confess your sins and be forgiven, or ask for grace in time of need, no matter where you may be, or what time of day it is. You do not have to go to a priest to do so.