ground of being is communio.”16 From this perspective, we can now understand how the unity of the object can include that of the subject: belief in the Trinity is communio; to believe in the Trinity means to become communio. Historically, this means that the “I” of the credo-formulas is a collective “I”, the “I” of the believing Church, to which the individual “I” belongs as long as it believes. In other words, the “I” of the credo embraces the transition from the individual “I” to the ecclesial
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