Ngaio Marsh said this quote

Above all things -- read. Read the great stylists who cannot be copied rather than the successful writers who must not be copied.

~ Ngaio Marsh

Why do you want to become an author? I will accept only one answer. If it is because you feel you can write better than you can do anything else then go ahead and do it without frills and flourishes. Stick to your present job and write in your spare time: but do it as if it is a whole time job.

~ Ngaio Marsh

You must be able to write. You must have a sense of form, of pattern, of design. You must have a respect for and a mastery over words.

~ Ngaio Marsh

Please don't entertain for a moment the utterly mistaken idea that there is no drudgery in writing. There is a great deal of drudgery in even the most inspired, the most noble, the most distinguished writing. Read what the great ones have said about their jobs; how they never sit down to their work without a sigh of distress and never get up from it witout a sigh of relief. Do you imagine that your Muse is forever flamelike -- breathing the inspired word, the wonderful situation, the superb solution into your attentive ear? ... Believe me, my poor boy, if you wait for inspiration in our set-up, you'll wait for ever.

~ Ngaio Marsh