Matthew 23 (the lectionary reading from the Gospel this Sunday) contains Jesus' condemnation of the Pharisees. However, it also contains one of the most overlooked passages in Scripture. Speaking of the scribes and Pharisees Jesus says, "The scribes and the Pharisees sit on Moses’ seat; 3 so practice and observe whatever they tell you. . ." (Matt 23:2-3). Of course, Jesus goes on to complain that the Pharisees are hypocrites.
The part that is overlooked however is that Jesus recognizes a binding teaching authoritative office without attributing to it sinlessness.
Notably, Jesus' description of Peter's role in Matthew 16 echoes his description of the Pharisees. For more, listen to the podcast on the Sunday readings below.
Here are my thoughts on it all.
Podcast: "Jesus' Shocking Words About the Pharisees in Matthew 23")(31st Sunday Ordinary Time, Cycle A) [right click to download]
During the podcast I mentioned some of the parallels between Jesus' teaching and the rabbis. Here is some more on that.