They echo through one's whole being in the profound silence that follows the reception of the Eucharist
"If you are the Body of Christ and his members," proclaims St. Augustine, "your divine mystery is set on the table of the Lord; you receive your own mystery...Be what you see and receive what you are." (Serm. 272)
Reading the quotation above by St. Augustine, I am reminded of the Catholic understanding of "divine mystery": Mystery is not something which can not be understood, but something about which we can never understand enough.