I can see so many truth words here, thanks for sharing. I want to take the liberty for add two ideas about this topic.

I always said to my friends, when they start to think that they have not the skills to write good things, that basically the act of write is like walk. First, you put a word, and them you put another, and another, and another, and there is! Obviously maybe in the begin you can't use all the words what you like to use, but you just have to keep going on it.

The next idea came from a friend. She said "A good book, is always a new book." It means, that doesn't matter how many times did you or somebody else read something good, because this always could create a new reaction or reflection in you.