Exactly. You do not let your eyes see nor your ears hear that which you cannot account for.
8 seconds sound clip from the Bram Stoker's Dracula (1992) movie soundboard.
You can hear this line at 01:01:50 in the Blu-ray version of the movie.
Quote context
[...]
- Those marks on her throat... no disease, no trituration I am sure the blood loss occurred there.
- You were once a careful student, Jack. Use your brain!
- Where did the blood go? Tell me!
- The bedclothes would be covered in blood.
- Exactly. You do not let your eyes see nor your ears hear that which you cannot account for.
- Something just went up there sucked it out of her and flew away, I suppose?
- That's brilliant. That's absolutely brilliant.
- Will one of you learned doctors, or whatever you are, kindly tell me what is going on with my Lucy?
[...]