In this sermon, Pastor Zack continues our study of Mark’s Gospel by looking at Mark 8:11-21 and Jesus’ warning to the disciples of the leaven of the Pharisees and of Herod. After examining the spiritual blindness of the Pharisees and then the spiritual dullness of the disciples, Pastor Zack helps us to apply Jesus’ warning to our lives today and see the importance and necessity of avoiding any leaven of false doctrine of practice that would seek to take us away from the pure, unadulterated Gospel of Jesus Christ.