The Hermeneutics of High Church Puritanism

Granted we are not under the Old Covenant, Rev'd Dr Peter Leithart rightly identifies a very important question: how, if at all, may the ceremonial, ritual and cultic aspects of the Old Covenant be used to govern the practices of New Covenant worship?

The Reformed would generally assume some continuity between the covenants while recognising differences: e.g. they circumcised their children, we baptise ours.

If you assume NT only worship you may end up in a rather different place than if you are willing to learn from the OT: e.g. you might ban musical instruments (which many Reformed people have), which you'd never do if you thought the Psalms taught New Testament believers the practicalities of how to worship.

See further Peter Leithart, 'Sacramental Hermeneutics' in Greg Strawbridge (ed.), The Case for Covenant Communion (Athanasius Press, 2006)