The attitude of Vitruvius towards other architects of his own age, to past authorities, and to personal experimentation is of interest to note, and roughly parallels the attitude of Galen in the field of medicine. Like Galen he complains that the artist must plunge into the social life of the day in order to gain professional success and recognition.[866] “And since I observe that the unlearned rather than the learned are held in high favor, deeming it beneath me to struggle for honors with the unlearned, I will rather demonstrate the virtue of our science by this publication.”[867] He also objects to the self-assertion and advertising of themselves in which many architects of his time indulge.[868] He recognizes, however, that the state of affairs was much the same in time past, since he tells a story how the Macedonian architect, Dinocrates, forced himself upon the attention of Alexander the Great solely by his handsome and stately appearance,[869] and since he asserts that the most famous artists of the past owe their celebrity to their good fortune in working for great states or men, while other artists of equal merit are seldom heard of.[870] He also speaks of those who plagiarize the writings of others, especially of the men of the past.[871] But all this does not lead him to despair of art and learning; rather it confirms him in the conviction that they alone are really worth while, and he quotes several philosophers to that effect, including the saying of Theophrastus that “the learned man alone of all others is no stranger even in foreign lands ... but is a citizen in every city.”[872] [Sidenote: Authorities and inventions.]