夫阴阳陶蒸，万象错布，玄化无言，神工独运。草木敷荣，不待丹碌之采;云雪飘扬，不待铅粉而白;山不待空青而翠，凤不待五色而綷，是故运墨而五色具，谓之得意。意在五色，则物象乖矣。                            

                                               摘自  唐  张彦远 《历代名画记》

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