For Catholics, the Holy Eucharist / Catholic Mass is considered the most important and highest form of prayer. In fact, attending Mass is an obligation, under penalty of mortal sin, each Sunday and on certain other Holy Days of Obligation. The Mass is divided into two sections, the Liturgy of the Word and the Liturgy of the Eucharist. The Liturgy of the Word consists of two readings (one from the Old Testament and one from the New Testament), the Responsorial Psalm, the Gospel reading, the homily (or sermon), and general intercessions (also called petitions).