“Communication is not limited to language. We express ourselves to others and we receive impressions from others and from God through signs and symbols. These communications by signs and symbols are often more effective than those of language. While this is true in ordinary life, it is particularly true in the church’s worship. The things communicated there have to do with the mysteries of our holy faith. These deep mysteries cannot, of course, be communicated so as to be understood fully or else they would no longer be mysteries. But signs and symbols often communicate the realities of the mysteries better than language.” (p. 64)
Ceremony and Celebration is an excellent resource for anyone who wants to better understand why we do what we do in the Divine Service. Understanding what is going on around us increases our appreciation for and insight into the details of the liturgy. Find more excerpts here, here, and here.