Thorns can’t be picked up with bare hands—they’ll pierce you. Instead, you use iron tools to destroy them. The Hebrew word barzel (בַּרְזֶל) means “iron,” a symbol of strength and force. David’s point is that some problems—especially people who harm others—can’t be managed gently or ignored. This challenges the modern instinct to always look for peaceful solutions or to believe that every person can be reasoned with. Sometimes, boundaries and consequences are necessary for safety. If you’ve ever struggled with setting limits on someone who keeps hurting you, this verse affirms that it’s not weakness to protect yourself. It’s wise to use the right tools for the situation, even if that means being firm or walking away.