Charles Ellicott Commentary Luke 6:39

"And he spake also a parable unto them, Can the blind guide the blind? shall they not both fall into a pit?" — Luke 6:39 (ASV)

And he spoke a parable to them.—The verse is noticeable:

1. As causing a break in the discourse which has no parallel in the Sermon on the Mount;
2. As giving an example of the wider sense of the word “parable,” as applicable to any proverbial saying that involved a similitude.

On the proverb itself, quoted in a very different context, see Note on Matthew 15:14. Here its application is clear enough. The man who judges and condemns another is as the blind leader of the blind. Assuming St. Paul to have known the Sermon on the Plain, we may trace an echo of the words in the guide of the blind of Romans 2:19.