How do we know our access to God is secure?

The Apostle Paul explains in Ephesians 3:12 that our access to God is through Christ, who has removed the separation created by sin. This was vividly illustrated in the Old Testament, particularly in Leviticus 16, where the high priest could only enter the Holy of Holies under strict conditions. However, Christ's atoning work breaks down that barrier permanently. With the veil torn at His death, we now enjoy unrestricted access to God, signifying that as redeemed believers, we are forever welcomed in His presence without fear of condemnation.