Before we can delve into the specific teachings regarding the liturgy of the Church, it is essential that we gain an understanding of the pattern or shape of the liturgy. The image of man ascending the mountain to meet with God and God descending upon the mountain to reveal Himself to man is a consistent theme throughout both the Old and New Covenants. In this teaching we discuss how the Mass, the liturgy, is the fulfillment of the prophet Isaiah’s words as recording in Isaiah 2: Now it shall come to pass in the latter days…that many people will come and say, “Come let us go to the mountain of the Lord, to the house of the God of Jacob. He will teach us His ways, and we shall walk in His paths.”