"All men by nature are actuated with the desire of knowledge," declared Aristotle. The philosopher's works are foundational to the history of science, and his treatise on metaphysics, or "first philosophy," is divided into sections on previous philosophical thought and theories; a refutation of skepticism; a demonstration of God's existence; an examination of the relation of metaphysics to the other sciences; an elucidation of the nature of the infinite;...

The Categories is a text from Aristotle's Organon that enumerates all the possible kinds of things that can be the subject or the predicate of a proposition. They are "perhaps the single most heavily discussed of all Aristotelian notions". The work is brief enough to be divided, not into books as is usual with Aristotle's works, but into fifteen chapters. The Categories places every object of human apprehension under one of ten categories (known to...

Greek philosopher and scientist, Aristotle, lived in the 4th century B.C. and is thought of as one of the most important figures from classical antiquity. Aristotle was probably the most famous member of Plato's Academy in Athens, whose writings would ultimately form the first comprehensive system of Western philosophy. His writings were not constrained to simply one field of inquiry but covered such various subjects as physics, biology, metaphysics,...

We have, in the next place, to treat of Memory and Remembering, considering its nature, its cause, and the part of the soul to which this experience, as well as that of Recollecting, belongs. For the persons who possess a retentive memory are not identical with those who excel in power of recollection; indeed, as a rule, slow people have a good memory, whereas those who are quick-witted and clever are better at recollecting.

The reasons for some animals being long-lived and others short-lived, and, in a word, causes of the length and brevity of life.

Our treatise proposes to find a line of inquiry whereby we shall be able to reason from opinions that are generally accepted about every problem propounded to us, and also shall ourselves, when standing up to an argument, avoid saying anything that will obstruct us. First, then, we must say what reasoning is, and what its varieties are, in order to grasp dialectical reasoning: for this is the object of our search in the treatise before us.

Let us now discuss sophistic refutations, i.e. what appear to be refutations but are really fallacies instead. Some reasonings are genuine, while others seem to be so but are not, is evident. This happens with arguments, as also elsewhere, through a certain likeness between the genuine and the sham.

Written sometime in the 4th Century BC, Aristotle's "Rhetoric" is the definitive treatise on the art of persuasive public speaking. The art of oratorical persuasion was an essential skill for the successful politician during the days of ancient Greece and Aristotle's "Rhetoric" is considered one of the greatest works from antiquity on the subject. Like many of the surviving works attributable to Aristotle, "Rhetoric" was not intended for public dissemination,...

Having now definitely considered the soul, by itself, and its several faculties, we must next make a survey of animals and all living things, in order to ascertain what functions are peculiar, and what functions are common, to them. What has been already determined respecting the soul must be assumed throughout. The remaining parts of our subject must be now dealt with, and we may begin with those that come first.

With regard to sleep and waking, we must consider what they are: whether they are peculiar to soul or to body, or common to both; and if common, to what part of soul or body they appertain: further, from what cause it arises that they are attributes of animals, and whether all animals share in them both, or some partake of the one only, others of the other only, or some partake of neither and some of both.