Philo Judaeus De Agricultura 13

[13] among which we must class medical science, when unconnected with practise, by which it is natural that such persons may be cured, and also the oratorical and hireling ¹ species of rhetoric, which is conversant not about the discovery of the truth, but solely about the means of deceiving the hearers by plausible persuasion; and in the same class we must place all those parts of dialectics and geometry which have no connection with a proper regulation of the character or morals, but which only sharpen the mind, not suffering it to exercise a dull apprehension towards each question which is raised and submitted to it, but always to dissect the question and divide it, so as to distinguish the peculiar character of each thing from the common qualities of the whole genus.