Quick answer
The book's harshest comparison, aimed at the man who speaks before thinking. It is the same verdict 26:12 gave the man wise in his own eyes.
Read both lines
The form is a question, and the opening verb חָזִיתָ is from the same root as חָזוֹן two verses earlier, which is a nice accident of proximity if it is an accident: do you see a man like this.
The verdict is borrowed. 26:12 said there is more hope for a fool than for a man wise in his own eyes, and this verse hands the same sentence to a different figure. What both share is a closed loop. The self-satisfied man will not receive correction; the hasty man has already spoken before correction could arrive. Neither leaves a gap where wisdom could get in, which is what the book means by having less hope than a fool, since a fool at least might still find out.
Related: Proverbs 26:12 · Proverbs 29:11 · Proverbs 21:5 · Proverbs 18:13
New King James Version®, Copyright © 1982, Thomas Nelson. All rights reserved. Full copyright information. Scripture provided by API.Bible.
Go Deeper
If this verse has been used to put weight on you that it was never carrying, ask about it directly.