There are men who have turned the abuse of the arts and sciences into an art in itself and, although they would not confess it themselves, their aim nevertheless is simply to display their own knowledge. But it seems to me that it is the aim and function of an intelligent mind to make new discoveries in whatever field such investigations may be useful, and also to bring to completion tasks that are but half-finished. On the other hand, a desire to use the art of abuse to belittle the scientific discoveries of others and to slander the discoveries of the learned to the illiterate, rather than to offer constructive criticism, is not so much the aim and function of an intelligent mind, as a proof of warped character and want of skill.
The Science of Medicine in Hippocratic Writings, trans. J. Chadwick and W. N. Mann (London: Penguin Classics, 1983), p.139