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To aim for the unspeakable divine, nothing beats the via pulchritudinis musicalis, the path of beauty advocated by Christian tradition, from Augustine to Luther and the recent popes, which contains parables to make the "unheard" of the Spirit heard and to reconcile the disagreements between humans. The article deploys twelve metaphors of musical spirituality as so many different sounds available to seekers of meaning, singers, and musicians of the infinite, playing on numbers: the sound of silence; the three-tone Trinitarian chord; the seven notes of the divine scale; humanity and the community of believers as a four-voiced choir; the five lines of the stave of existence; the righteousness (justice) of the six strings of the guitar; the transcendence of the Christian melody; the stereophony between heaven and earth; the novelty of the final biblical Maranatha; the two hands and ten fingers of the pianist; song and music for the spiritual journey and liturgy; and the 144,000 voices of the hymns of Revelation. For, beyond words, nothing reaches the heart of God like a perfect harmony, when the final chord is sounded...