For since the law has but a shadow of the good things to come instead of the true form of these realities, it can never, by the same sacrifices that are continually offered every year, make perfect those who draw near. Otherwise, would they not have ceased to be offered, since the worshipers, having once been cleansed, would no longer have any consciousness of sins? But in these sacrifices there is a reminder of sins every year. For it is impossible for the blood of bulls and goats to take away sins.
Consequently, when Christ came into the world, he said,
“Sacrifices and offerings you have not desired, but a body have you prepared for me; in burnt offerings and sin offerings you have taken no pleasure.
Then I said, ‘Behold, I have come to do your will, O God, as it is written of me in the scroll of the book.’”
When he said above, “You have neither desired nor taken pleasure in sacrifices and offerings and burnt offerings and sin offerings” (these are offered according to the law), then he added, “Behold, I have come to do your will.” He does away with the first in order to establish the second. And by that will we have been sanctified through the offering of the body of Jesus Christ once for all.
And every priest stands daily at his service, offering repeatedly the same sacrifices, which can never take away sins. But when Christ had offered for all time a single sacrifice for sins, he sat down at the right hand of God, waiting from that time until his enemies should be made a footstool for his feet. For by a single offering he has perfected for all time those who are being sanctified. Hebrews 10:1-14
In those ancient times prior to the life and ministry of our Lord Jesus Christ, animal sacrifice was quite common, and here the Apostle attempts to point out that the blood of animals cannot take away the sins of the world, but by his selfless sacrifice Christ has atoned for all our sins.
Ask yourself: how does this event of two millennia past, relate to me in this present time?
Do you allow Christ to take this burden of your sins from you so that you may find peace within?
Don’t let your actions and regrets of the past lie to you telling you that you are defeated and worthless, but rather let Christ take that burden from you.
In John 8:11 NIV we find Christ telling the woman accused of adultery; “Go now and leave your life of sin.” Since Christ died for you, can you not make at least an effort to leave your life of sin behind?
Say this prayer or one of your own;
Heavenly Father, I release to You the burdens that I have been carrying, burdens that You never intended for me to carry. I cast all my cares upon You–all my worries, all my fears. You have told me not be anxious about anything, but rather to bring everything to You in prayer with thankfulness. 
Go out into the world in peace;
hold on to what is good;
return no one evil for evil;
strengthen the fainthearted;
support the weak; help the suffering;
honor everyone; love and serve God;
rejoicing in the power of the Holy Spirit!