Drawing too. ...take pains and pleasure in constantly copying the best things which you can find done by the hand of great masters. [...] take care to select the best one [...] If you follow the course of one man through constant practice, your intelligence would have to be crude indeed for you not to get some nourishment from it. Then you will find, if nature has granted you any imagination at all, that you will eventually acquire a style individual to yourself, and it cannot help being good; because your hand and your mind, being always accustomed to gather flowers, would ill know how to pluck thorns. --Cennino Cennini, about 1400.