And he spake to them a parable. Luke relates this saying without mentioning any occurrence, but states generally, that Christ made use of this parable; as in recording many of Christ's discourses he says nothing as to the occasion on which they were delivered. It is no doubt possible that Christ may have spoken this parable more than once; but, as no place more appropriate was to be found, I have not hesitated to insert here what Luke relates without fixing the time.

A parable - A proverb or similitude.
Can the blind lead the blind? - See the notes at Matthew 15:14.

Can the blind lead the blind? - This appears to have been a general proverb, and to signify that a man cannot teach what he does not understand. This is strictly true in spiritual matters. A man who is not illuminated from above is utterly incapable of judging concerning spiritual things, and wholly unfit to be a guide to others. Is it possible that a person who is enveloped with the thickest darkness should dare either to judge of the state of others, or attempt to lead them in that path of which he is totally ignorant! If he do, must not his judgment be rashness, and his teaching folly? - and does he not endanger his own soul, and run the risk of falling into the ditch of perdition himself, together with the unhappy objects of his religious instruction?

(7) And he spake a parable unto them, Can the blind lead the blind? shall they not both fall into the ditch?
(7) Unskillful reprehenders hurt both themselves and others: for as the teacher is, so is the student.

And he spake a parable unto them,.... The Vulgate Latin reads, "he spake also a parable unto them"; besides what he said; and the Arabic version renders it, "another similitude", parable, or proverb, distinct from the comparisons, allusions, and proverbial expressions in the preceding verses. Though it should be observed, that these words were not spoken at the same time, nor on the mount, as the foregoing were; but this, and what follow, are a collection of various expressions of Christ at different times, some delivered on the mount, and others elsewhere; unless it should be rather thought, that these proverbs and sentences were repeated at different places and times, which is not improbable:
can the blind lead the blind? they may do so, as the blind Scribes and Pharisees led the blind people of the Jews, which is what our Lord intends; but if they do, as they did,
shall they not both fall into the ditch? yes, verily, what else can be expected? See Gill on Matthew 15:14.

Can the blind, &c.--not in the Sermon on the Mount, but recorded by Matthew in another and very striking connection (Matthew 15:14).

Can the blind lead the blind? See notes on Matthew 15:14.

He spake a parable - Our Lord sometimes used parables when he knew plain and open declarations would too much inflame the passions of his hearers. It is for this reason he uses this parable, Can the blind lead the blind? - Can the scribes teach this way, which they know not themselves? Will not they and their scholars perish together? Can they make their disciples any better than themselves? But as for those who will be my disciples, they shall be all taught of God; who will enable them to come to the measure of the stature of the fulness of their Master. Be not ye like their disciples, censuring others, and not amending yourselves. Matthew 15:14.