During his studies in Paris, American sculptor Augustus Saint-Gaudens (1848-1907) came up with three guiding principles for his artwork.
1. Conceive an idea. Then stick to it. Those who hang on are the only ones who amount to anything.
2. You can do anything you please. It’s the way it’s done that makes the difference.
3. A good thing is no better for being done quickly.
Wikipedia on Augustus Saint-Gaudens
From The Greater Journey by David McCullough, Quoted from The Reminiscences of Augustus Saint-Gaudens