Before Christ, there was a veil which separated the people from the Holy of Holies in the Tabernacle of the Temple  because only God was perfect enough to be there. Paul explains what changed when Christ came to provide redemption for sin in 2 Corinthians 3:16, But whenever anyone turns to the Lord, the veil is taken away. Christ’s perfect sacrifice for all our sins removed the veil that separates us from God. Because of Christ we are no longer separated from God and we have direct access to Him.