Marshall McLuhan in The Gutenberg Galaxy:
For Cicero, wisdom is eloquence because only by eloquence can knowledge be applied to the minds and hearts of men. It is applied knowledge that obsesses the mind of Cicero the Roman as it did the mind of Francis Bacon. p.24
From A History of Psychology in Autobiography, B.F. Skinner says:
In both my writing and my research I have fought hard against deceiving myself. I avoid metaphors which are effective at the cost of obscuring issues. I avoid rhetorical devices which give unwarranted plausibility to an argument (and I sometimes reassure myself by making lists of the devices so used by others). I avoid the unwarranted prestige conferred by mathematics, even, I am afraid, when mathematics would be helpful.
