Does the painter imitate the body correctly if he guides his brush without any method, and if his hand is moved at random and the lines are not drawn with art? In the same way you will not put the sentiment of your mind in front of the others' eyes unless you use appropriate and distinct words, a fitting arrangement of words and the right order of sentences. For, just as we represent bodies by colours, we represent the sentiment of our mind by speech.

p. 63 - Praise of eloquence (1523)