§ 75 Use of Design (or Drawing) in the Various Arts
All these, whether we call them profiles or otherwise, are as useful to architecture and sculpture as to painting. Their chief use indeed is in Architecture, because its designs are composed only of lines, which so far as the architect is concerned, are nothing else than the beginning and the end of his art, for all the rest, which is carried out with the aid of models of wood formed from the said lines, is merely the work of carvers and masons.187
In Sculpture, drawing is of service in the case of all the profiles, because in going round from view to view the sculptor uses it when he wishes to delineate the forms which please him best, or which he intends to bring out in every dimension, whether in wax, or clay, or marble, or wood, or other material.
In Painting, the lines are of service in many ways, but especially in outlining every figure, because when they are well drawn, and made correct and in proportion, the shadows and lights that are then added give the strongest relief to the lines of the figure and the result is all excellence and perfection. Hence it happens, that whoever understands and manages these lines well, will, with the help of practice and judgement, excel in each one of these arts. Therefore, he who would learn thoroughly to express in drawing the conceptions of the mind and anything else that pleases him, must after he has in some degree trained his hand to make it more skilful in the arts, exercise it in copying figures in relief either in marble or stone, or else plaster casts taken from the life, or from some beautiful antique statue, or even from models in relief of clay, which may either be nude or clad in rags covered with clay to serve for clothing and drapery. All these objects being motionless and without feeling, greatly facilitate the work of the artist, because they stand still, which does not happen in the case of live things that have movement. When he has trained his hand by steady practice in drawing such objects, let him begin to copy from nature and make a good and certain practice herein, with all possible labour and diligence, for the things studied from nature are really those which do honour to him who strives to master them, since they have in themselves, besides a certain grace and liveliness, that simple and easy sweetness which is nature’s own, and which can only be learned perfectly from her, and never to a sufficient degree from the things of art. Hold it moreover for certain, that the practice that is acquired by many years of study in drawing, as has been said above, is the true light of design and that which makes men really proficient. Now, having discoursed long enough on this subject let us go on to see what painting is.