Quick answer
Eagerness without information is not a virtue. The verse pairs an empty head with fast feet and says the combination goes wrong.
Read both lines
"Soul" here is nephesh, the word this book uses for a living person rather than for an immortal part of one, settled in the catalog at 12:10 where it describes a farm animal. So the first line is about a whole person operating without what he needs to know. The second line supplies the picture: feet in a hurry. Both halves describe the same man from different angles, which is how the couplet works, and the verse's quiet claim is that zeal is not self-justifying. Wanting something badly and moving toward it quickly are not the same as understanding it. The book is not against action. It is against arriving somewhere you never learned about.
Related: Proverbs 12:10 · Proverbs 21:5 · Proverbs 14:15
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.