“It is all very well to copy what you see; it is much better to draw what you only see in memory. There is a transformation during which the imagination works in conjunction with the memory. You only put down what made an impression on you, that is to say the essential. Then your memory and your invention are freed from the dominating influence of nature. That is why pictures made by a person with a trained memory are almost always remarkable works.”               

                                                                                                      –  DEGAS