Did you know that we have false vocal chords? And that they can clamp down when a person is stressed, meaning that the true vocal cords can't work? Very, very interesting.
Relaxation is often the key to good writing. When you go away and someone or something else does all the work and you come back and there it all is - pages and pages of much better writing that you could ever do by yourself.
You can see where I'm going with this, can't you? But itsn't it interesting that we say 'voice' about writing and that it's so closely linked with the real voice.
Learning to control false vocal chords is like wiggling the ears. It feels impossible at the moment, but this is a trick I must get the hang of!