The Gospel (chanted or read in Holy Mass) is not only instruction, it is also revelation. In human form the divine becomes present. As often as the holy Gospel is announced, Christ the Lord steps into our midst. "Jesus in the midst of His disciples!" If the Gospel were instruction only, the frequent repetition of certain Gospel-portions might be considered unnecessary. But because it is an appearance of Christ, a revelation of the Lord, an "epiphany" of our God-King, it is as refreshing as the daily rising sun, old yet ever new. No matter how often a passage be read (liturgically, not just privately), no matter how well we might know its contents, it is for us another opportunity to say: Gloria tibi! Laus tibi! to Christ our Lord again becoming present in our midst.
Fr. Martin Hellriegel, The Holy Sacrifice of the Mass, p. 34 (1944)