Of writing skills, personality and actors

“Style is tied to the psyche, and writing has deep psychological roots. The reasons we express ourselves as we do, or fail to express ourselves because of “writer's block,” are partly buried in the subconscious mind.” - William Zinsser in On Writing Well

Scary words. The author tells us that you can't express beyond yourself. What you are imposes serious limitations on what you can write. (Unlike filmi heroines who can express themselves so well without a clue of the language a movie is made. Telugu movie industry (rather audience?) are hardest hit.)

Is this true? I don't want to believe this. I am more inclined to believe that those who have good writing skills are merely better trained. (Like Kamal Hassan may not know telugu well. But he knows acting!)

And it seems more like a cap and not writing skills are a sort of “linear function” of your personality. Is the converse (who are able to express themselves have good personalities) true? (This should mean Divya Bharati has great personality!)