I found this quote from Neil Garman certainly hit the nail on the head as far as I am concerned.
In my experience, writer’s block is very real. You’ll be writing something and suddenly it stops. The characters stop talking. You’ve been happily just transcribing everything they’ve been saying, and suddenly they sit down and shut up. Suddenly, you are in deep trouble. It does happen. It’s very real.
NEIL GAIMAN
