“Come, let us sing to the Lord and shout with joy to the Rock who saves us. . . “ Psalm 95, also known to Catholics as the Invitatory psalm, is said by most clergy and religious and many lay persons each morning before Morning Prayer. Its first two lines invite us to pray, to sing, to shout with joy and to give praise and thanksgiving. The next three lines expound on the mighty God and His domination over the earth, the mountains, the sea and the dry lands. The next two lines again invite us to pray because He is our God and we are his flock. Lastly, the psalm reminds us of the consequence of challenging and provoking God with our sins just as the Israelites challenged God in the desert after they had been lead from Egypt and had seen the miracles that God had performed. (He named the place Massah and Meribah because of the quarrel of the sons of Israel, and because they tested the LORD, saying, "Is the LORD among us, or not?" Exodus 17:7) As a consequence of that challenge t