Mixed City of God and Boundaries of the Church

"Invoking Augustine’s account of the ‘interwoven’ (permixtum) relation of the two cities, Ward concludes to ‘a necessary agnosticism’ (CG, 228-29). Therefore, not only does he resist identifying the church with the heavenly city – as Augustine rightly counseled against (CG, 229) – but he is also reticent to identify boundaries of this earthly human institution (CG, 257-58)."

James K.A. Smith, Introducing Radical Orthodoxy, P. 257