WE take time today to prepare ourselves for the readings from this Sunday's celebration of the Liturgy. In our first reading we see when God had freed the Chosen People from the slavery of Egypt. He, then, led them to Mount Sinai. There he made a Covenant with the Israelites through which He promised to make them His own people, to lead them into the Promised Land, and to protect them from their enemies there. The Israelites were to reverence Him and Him only as their Lord, and they were to obey the moral and cultic laws which He laid down for them.