The Christology of Hebrews also undoes forever any notion of mystical communion with God. By this, I mean that communion which bypasses Christ to have a direct experience of divine enlightenment, or some numinous spiritual feeling. This is important when we see many contemporary worship songs, activities and approaches which emphasis the inner psychological/emotional state of the worshipper and use it as the criterion to decide if worship has been effective or not. Hebrews will not let us replace the mediation of Christ with the mediation of the worship leader who is able to engender an effective response, which is then interpreted as direct communion with God.
—Noel Due, Created For Worship: From Genesis to Revelation to You, 181