ɐkˈoːɹdɪŋ tə ðɪ ˌaɪdɪˈɑːlədʒˌɪsts ʌvðə ɹˈɑːkɚ, ðə pˈaʊɚfəl ˌʌndɚɡɹˈaʊnd tʃˈɜːtʃ ɪnðə jˌuːˌɛsˌɛsˈɑːɹ wˌɪtʃ wʌz ɪn ˌɑːpəzˈɪʃən tə ðə mˈɑːskoʊ pˈeɪtɹɪˌɑːɹkeɪt pɹˈuːvd ðɪ ɪlədʒˈɪɾɪməsi ʌvðɪ əfˈɪʃəl hˈaɪɚɹɑːɹki.
According to the ideologists of the ROCOR, the powerful underground church in the USSR which was in opposition to the Moscow Patriarchate proved the illegitimacy of the official hierarchy.