Your enemy can attack from any direction. You won't see him, but you'll know.
5 seconds sound clip from The Master (1984) - Failure to Communicate (S1E11) sitcom.
You can hear this line at 00:02:30.357 in the Blu-ray version of the TV Series.
Quote context
[...]
- Is that incredible? What do you say? Is it a deal?
- Are you going to be our Pit Stop man?
- I don't think so, Mr. Osborne.
- But how can you pass this up?
- For starters, I'd never get dressed up that way.
- Come at me. Feel my presence.
- Your enemy can attack from any direction. You won't see him, but you'll know.
- Again.
- I think you had just a small advantage.
- Yours would be the advantage when you can sense the sword, without seeing the blade.
- Dad wrote to me about the fog in this place. Comes up from the marshes. Something eerie about it.
[...]