The quote you’re referring to is often attributed to Galileo Galilei:
“You cannot teach a man anything; you can only help him find it within himself.”
A more direct version of your idea—about arguing with fools—is commonly paraphrased (though not perfectly verified as his exact words):
“Never argue with a fool; onlookers may not be able to tell the difference.”
🧠 What it really means
The core idea is simple but powerful:
- Some arguments aren’t about truth—they’re about ego.
- If someone isn’t open to reason, logic won’t change their mind.
- Engaging too deeply can make you look just as unreasonable.
✔️ The smartest approach
Instead of trying to “win”:
- Stay calm – don’t get dragged into emotional reactions
- Set boundaries – it’s okay to disengage
- Ask questions – sometimes it exposes weak reasoning
- Walk away – silence is often the strongest response
In short: You don’t win by defeating a fool—you win by not playing the game.