Isaiah 58:1-9, Psalm 51:3-4.5-6ab.18-19, Matthew 9:14-15 The Book of Isaiah is constituted of three Books or three authors and three époques, depending on what one wants to lay emphases on or which school of thought one belongs. Today’s reading was taken from the third Isaiah and belongs to the post exile oracles. By the time the Israelites were in exile, the temple was desecrated and on top of the Holy Mountain were…