Lex orandi legem statuit credendi - the law of prayer establishes the law of belief. While the Church established the rubrics and norms of liturgical prayer and worship based on the beliefs and doctrines she holds; for the individual Catholic, the practice of prayer and the rites of liturgical worship come before belief in the doctrines. We believe because we practice our worship in a particular way which emphasizes those doctrines.
On the Feast of Corpus Christi, we consider how the rites and rituals of the Mass (and of the Eucharistic Procession) teach us what we believe about the Eucharist.
Listen online [here]!