The sinfulness of flesh cannot stand to dwell in His Presence. The prophet Ezekiel fell upon his face when he beheld the glory of the Lord. Joshua fell on his face to the earth and did worship. When Isaiah beheld the holiness of God, he became instantly aware of his own unworthiness before God. No man can see God and live.
Sanctification plays an important part in our salvation.
Without holiness we will never see God. Our offering must be in a clean vessel. Judgment begins first at the house of God. The bondage from which we are freed is from being servants of sin, to becoming slaves of righteousness. We are not to falsely trust in our righteousness, or to take the grace of God in vain by living carelessly.