This weekend the Catholic community of Our Lady of Mount Carmel will be celebrating the Solemnity of the Most Holy Body and Blood of Christ also known as Corpus Christi. Corpus Christi (Body and Blood of Christ) is a Eucharistic solemnity, or better, the solemn commemoration of the institution of that sacrament. It is, moreover, the Church’s official act of homage and gratitude to Christ, who by instituting the Holy Eucharist gave to the Church her greatest treasure. Holy Thursday, assuredly, marks the anniversary of the institution, but the commemoration of the Lord’s passion that very night suppresses the rejoicing proper to the occasion. Today’s observance, therefore, accents the joyous aspect of Holy Thursday. The Mass and the Office for the feast was edited or composed by St. Thomas Aquinas upon the request of Pope Urban IV in the year 1264. It is unquestionably a classic piece of liturgical work, wholly in accord with the best liturgical traditions. . . It is a perfect work of art.
— Excerpted from The Church’s Year of Grace, Pius Parsch.