Answer:
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
What is it that no man ever yet did see, which never was, but always is to be?
Being able to interpret the letters on this screen proves that you have this quality.
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
I can run but not walk. Wherever I go, thought follows close behind.
When is it bad luck to see a black cat?