I figure that that has a ten year cycle. At the end of that ten years, I began to get worried that I would run into what is known as the writer’s block, the feeling of not being able to do these things.

A. E. van Vogt about End:

I figure that that has a ten year cycle. At the end of that ten years, I began to get worried that I would run into what is known as the writer’s block, the feeling of not being able to do these things.