De Anima asks what soul is by beginning with the observable powers of living things. Aristotle reviews earlier accounts from thinkers such as Democritus, Empedocles, Anaxagoras, and Plato, then rejects explanations that make soul either a wandering body, a harmony, or a separate passenger inside the organism.
Author
Aristotle
· Greek philosopher, student of Plato, tutor to Alexander and founder of the Lyceum

Frequently Cited
“Tragedy, then, is an imitation of an action that is serious, complete, and of a certain magnitude”
“through pity and fear effecting the proper purgation of these emotions”
“The Plot, then, is the first principle, and, as it were, the soul of a tragedy”
“Poetry, therefore, is a more philosophical and a higher thing than history: for poetry tends to express the universal, history the particular.”
“It is like a rout in battle stopped by first one man making a stand and then another, until the original formation has been restored. The soul is so constituted as to be capable of this process.”
“If then it is both by nature and for an end that the swallow makes its nest and the spider its web, and plants grow leaves for the sake of the fruit and send their roots down (not up) for the sake of nourishment, it is plain that this kind of cause is operative in things which come to be and are by nature.”
“It is plain then that nature is a cause, a cause that operates for a purpose.”
“for as it is not one swallow or one fine day that makes a spring, so it is not one day or a short time that makes a man blessed and happy”
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Politics examines the polis as the community ordered toward living well. Aristotle begins with the household, including relations of master and slave, husband and wife, parent and child, and then argues that the city exists by nature because human beings possess speech about justice and advantage.
This volume joins two treatises by Aristotle that together set out what scientific knowledge is and how the natural world is to be understood. The Posterior Analytics, in two books, belongs to the logical works later grouped as the Organon.
The Nicomachean Ethics asks what the human good is and how a life can be shaped toward it. Aristotle begins from the idea that every craft, inquiry and action aims at some good, and that the highest practical good is eudaimonia, often translated happiness or flourishing.
The Poetics is Aristotle's short treatise on the art of poetry, chiefly tragedy and epic, and the oldest surviving work of literary theory in the West. It opens by defining all poetry, together with music and dance, as imitation (mimesis), and by distinguishing the arts according to the medium of imitation (rhythm, language, melody), the objects imitated (people better than us, worse, or like us), and the manner (narration or enactment).