Adam Clarke on Matthew 22:33

The multitude were astonished at his doctrine - God uses the infidelity of some for the edification of others. Had no false doctrine been broached in the world, we had not seen the full evidence of the true teaching. The opposition of deists and infidels has only served to raise up men in behalf of the truth of God, who not only have refuted them, but shown, at the same time, that the sacred testimonies are infinitely amiable in themselves, and worthy of all acceptation. Truth always gains by being opposed.