Iniquity and the Solemn Assembly

God has prescribed the forms and appointments of His worship. This was true for Old Covenant worship and it is true for the New Covenant worship of the church. Yet, from the beginning the primacy has been upon the worshiper coming with a heart and life conducive to worship. Worship, however correct in outward form, which proceeds from a professed worshiper whose heart and life characterized by impenitence, presumption, and disobedience, is a sham. God repudiates the hypocritical attempt to mix wickedness and worship. What iniquity is the New Covenant worshipers combining with the spiritual sacrifices he professes to offer amidst the worship of Christ's church?