Mark 8:15

Of the leaven of Herod. In St. Matthew chap. xvi. ver. 6, we read of the leaven of the Pharisees and Sadducees: we may conclude that Christ named all of them. (Witham)

1. What the caution was (v. 15); "Take heed, beware, lest ye partake of the leaven of the Pharisees, lest ye embrace the tradition of the elders, which they are so wedded to, lest ye be proud, and hypocritical, and ceremonious, like them." Matthew adds, and of the Sadducees; Mark adds, and of Herod: whence some gather, that Herod, and his courtiers were generally Sadducees, that is, deists, men of no religion. Others give this sense, The Pharisees demanded a sign from heaven; and Herod was long desirous to see some miracle wrought by Christ (Luke 23 8); such as he should prescribe, so that the leaven of both was the same; they were unsatisfied with the signs they had, and would have others of their own devising; "Take heed of this leaven" (saith Christ), "be convinced by the miracles ye have seen, and covet not to see more."

Verses 11-21 Obstinate unbelief will have something to say, though ever so unreasonable. Christ refused to answer their demand. If they will not be convinced, they shall not. Alas! what cause we have to lament for those around us, who destroy themselves and others by their perverse and obstinate unbelief, and enmity to the gospel! When we forget the works of God, and distrust him, we should chide ourselves severely, as Christ here reproves his disciples. How is it that we so often mistake his meaning, disregard his warnings, and distrust his providence?