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In page Nicene Creed:

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"Credo", which in classical Latin is used with the accusative case of the thing held to be true (and with the dative of the person to whom credence is given),[5] is here used three times with the preposition "in", a literal translation of the Greek εἰς (in unum Deum [...], in unum Dominum [...], in Spiritum Sanctum [...]), and once in the classical preposition-less construction (unam, sanctam, catholicam et apostolicam Ecclesiam).[citation needed]