“But when Christ appeared as a high priest of the good things that have come, then through the greater and more perfect tent (not made with hands, that is, not of this creation) he entered once for all into the holy places, not by means of the blood of goats and calves but by means of his own blood, thus securing an eternal redemption. For if the blood of goats and bulls, and the sprinkling of defiled persons with the ashes of a heifer, sanctify for the purification of the flesh, how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, purify our conscience from dead works to serve the living God. Therefore he is the mediator of a new covenant, so that those who are called may receive the promised eternal inheritance, since a death has occurred that redeems them from the transgressions committed under the first covenant.” (Hebrews 9:11-15 ESV)
“For Christ has entered, not into holy places made with hands, which are copies of the true things, but into heaven itself, now to appear in the presence of God on our behalf. Nor was it to offer himself repeatedly, as the high priest enters the holy places every year with blood not his own, for then he would have had to suffer repeatedly since the foundation of the world. But as it is, he has appeared once for all at the end of the ages to put away sin by the sacrifice of himself. And just as it is appointed for man to die once, and after that comes judgment, so Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him.” (Hebrews 9:24–28 ESV)
Jesus came from the perfect place of heaven and entered in to the holy of holies by means of His own atoning blood. The alter is now closed, the veil has been ripped in two (Matthew 27:51, Mark 15:38, Luke 23:45), it is finished, a superior sacrifice has been offered and has been accepted. No other sacrifice is required (like your hard fought obedience to the rules). Jesus has secured an eternal redemption for all who believe. Jesus entered in to the heavenly dwelling in the presence of God, after paying the debt for sinners. This process was once, for all who will believe. The alter is now closed, no other sacrifice is required. You don’t have to earn your way, you don’t have to prove that you are worthy (because you’re not). You can’t add anything to the completed work of Christ. Walk freely in this truth – there is no place for striving or proving in the life of a Christian. His sacrifice was adequate, He lived the perfect life that we should have lived and then paid the ultimate price that we couldn’t pay so that we could be redeemed. You’re not worthy, but He set His saving affections upon you anyway according to His sovereign grace. Allow this truth to produce worship in your soul!