These are some of the inspirational quotes that I found about writing.

“Usually, when people get to the end of a chapter, they close the book and go to sleep. I deliberately write my books so when the reader gets to the end of a chapter, he or she must turn one more page. When people tell me I’ve kept them up all night, I feel like I’ve succeeded!”
–Sidney Sheldon

“Success is a finished book, a stack of pages each of which is filled with words. If you reach that point, you have won a victory over yourself no less impressive than sailing single-handed around the world.”
–Tom Clancy

‘The most essential gift for a good writer is a built-in, shock-proof shit detector. This is the writer’s radar and all great writers had it.’

Ernest Hemingway

“At night, when the objective world has slunk back into its cavern and left dreamers to their own, there come inspirations and capabilities impossible at any less magical and quiet hour. No one knows whether or not he is a writer unless he has tried writing at night.”
H. P. Lovecraft

‘The King died and then the Queen died. That is a story. The King died and then the Queen died of grief. That is a plot.’

E M Forster in Aspects of the Novel

The first chapter sells the book; the last chapter sells the next book.     -Mickey Spillane

“It’s an adrenaline surge rushing through your body. You have this spark of an idea that keeps threatening to burst into flames and you have to get the words out on paper to match this emotion or picture in your head.  After this comes the work of cleaning up the mess that you made.”
-Janet West

‘Nobody asks you to do this.  The world out there is not panting after another novelist.  We choose it.’

Paul Auster, quoted in an interview with his wife, novelist Siri Hustvedt

‘The crown of literature is poetry. It is its end and aim.  It is the sublimest activity of the human mind.  It is the achievement of beauty and delicacy. The writer of prose can only step aside when the poet passes.’

Somerset Maugham

(There are probably many more, but I don’t think I have any energy left for copy pasting them.)