Jealousy

Writing is often cruel, which is why it's critical to not make it any harder than it already is.

And one of the easiest ways to make writing cruel is to allow room in your mind for jealousy of other writers.

There will always be other writers who are more talented than you. There will always be writers who are luckier than you. And there will always be writers who sell more books and have more readers than you. Many, perhaps most, of those writers will be depressingly less talented than you.

Get used to it. Internalize the fundamental truth that life isn't fair.

And don't carve out any room in your mind for ill feelings. Don't indulge in envy or other negative emotions, especially when those feelings will interfere with your ideas, your creativity and your karma. Wish those writers well, as sincerely as you can, and then shut up and get back to writing.