[10]
More than that, they do not attribute any of this power either to the practical experience or to the native ability of the student, but undertake to transmit the science of discourse as simply as they would teach the letters of the alphabet,1 not having taken trouble to examine into the nature of each kind of knowledge, but thinking that because of the extravagance of their promises they themselves will command admiration and the teaching of discourse will be held in higher esteem—oblivious of the fact that the arts are made great, not by those who are without scruple in boasting about them, but by those who are able to discover all of the resources which each art affords.
1 See General Introd. p. xxii.