The difference between a learned man and an ignorant one is the same as that between a living man and a corpse.
AristotleAnybody can become angry - that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way - that is not within everybody's power and is not easy.
AristotleRhetoric may be defined as the faculty of observing in any given case the available means of persuasion.
Aristotle