All human actions have one or more of these seven causes: chance, nature, compulsions, habit, reason, passion, desire.Aristotle
Rhetoric may be defined as the faculty of observing in any given case the available means of persuasion. This is not a function of any other art.Aristotle
A statement is persuasive and credible either because it is directly self-evident or because it appears to be proved from other statements that are so.Aristotle
Whether if soul did not exist time would exist or not, is a question that may fairly be asked; for if there cannot be someone to count there cannot be anything that can be counted, so that evidently there cannot be number; for number is either what has been, or what can be, counted.Aristotle
Persuasion is clearly a sort of demonstration, since we are most fully persuaded when we consider a thing to have been demonstrated.Aristotle
The true and the approximately true are apprehended by the same faculty; it may also be noted that men have a sufficient natural instinct for what is true, and usually do arrive at the truth. Hence the man who makes a good guess at truth is likely to make a good guess at probabilities.Aristotle
Man is the only animal capable of reasoning, though many others possess the faculty of memory and instruction in common with him.Aristotle
He who can be, and therefore is, another's, and he who participates in reason enough to apprehend, but not to have, is a slave by nature.Aristotle
