Barnes New Testament Notes

Verse 14. Let them alone. That is, do not be troubled at their rage. Be not anxious about it. The thing was to be expected. They were blind; they were in some respects sincere. They are greatly attached to their traditions, and you are not to wonder or interfere when they are indignant. They lead also the blind. They have a vast influence over the multitude, and it is to be expected that they will be enraged at any doctrines that go to lessen their authority or influence. By commanding them to let them alone, he does not mean to suffer them to remain in error, without any attempt to refute or correct them -- for this he was doing then; but he meant to charge his disciples not to mind them, or to regard their opposition. It was to be expected.

If the blind lead the blind, etc. This was a plain proposition. A blind man, attempting to conduct blind men, would fall into every ditch that was in the way. So with religious teachers. If these Pharisees, themselves ignorant and blind, should be suffered to lead the ignorant multitude, both would be destroyed. This was another reason for confuting their errors, or for rooting up the plants which God had not planted. He wished, by doing it, to save the deluded multitude.

God often suffers one man to lead many to ruin. A rich and profligate man, an infidel, a man of learning, a politician, or a teacher, is allowed to sweep multitudes to ruin. This is not unjust, for those who are led are not compelled to follow such men. They are free in choosing such leaders, and they are answerable for being led to ruin.

See Barnes on "Mt 15:10"

{k} "they be blind" Mt 23:16; Lu 6:39