Although the Phaedo never mentions a Form of Soul explicitly, the dialogue implies this Form’s existence. First, a number of passages in which Socrates describes his views about Forms imply that there are very many Forms; thus, Socrates’ general description of his theory gives no ground for denying that there is a Form of Soul. Second, the final argument for immortality positively requires a Form of Soul.

David Bostock examines the theories and arguments put forward by Plato in his Phaedo, in which he attempts to show that the soul is immortal. This excellent introduction to Plato's often difficult arguments discusses such important philosophical problems as the nature of the mind, the idea of personal identity, the question of how we understand language, and the concept of cause, reason, and explanation.

It can be shown that, if we assume 'substance dualism', or the real distinctness of the soul from the body, then the standard objections to the Cyclical Argument in the "Phaedo" fail. So charity would presumably require that we take substance dualism to be presupposed by that argument. To do so would not beg any question, since substance dualism is a significantly weaker thesis than the immortality of the soul. Moreover, there is good textual evidence in favor of this presumption. (...) A closer look at the immediately preceding passage, viz. "Socrates' Defense", reveals an argument for a real distinction between soul and body, not unlike Descartes' famous argument, based on the identification of an activity in which the soul can in principle engage on its own, without assistance from the body. The argumentative project of the "Phaedo," on this reading, becomes: given that the soul is really distinct, show that it is immortal. And Plato aims to do this in two stages. The three initial arguments are meant to establish merely the minimal claim that the continued existence of the soul across cycles of reincarnation is the most plausible view to take, given substance dualism; and it is left to the Final Argument to argue for something that we might regard as immortality, that is, the imperishability of the soul, come what may. (shrink)

Important study focuses on the revival and assimilation of ancient Greek mathematics in the 13th–16th centuries, via Arabic science, and the 16th-century development of symbolic algebra. This brought about the crucial change in the concept of number that made possible modern science — in which the symbolic "form" of a mathematical statement is completely inseparable from its "content" of physical meaning. Includes a translation of Vieta's Introduction to the Analytical Art. 1968 edition. Bibliography.

In this book, William H. F. Altman argues that it is not order of composition but reading order that makes Euthyphro, Apology of Socrates, Crito, and Phaedo “late dialogues,” and shows why Plato’s decision to interpolate the notoriously “late” Sophist and Statesman between Euthyphro and Apology deserves more respect from interpreters.

Since antiquity the Phaedo has been considered the source of "the twin pillars of Platonism" -- the theory of ideas and the immortality of the soul. Burger's attempt to trace the underlying argument of the work as a whole leads to a radical rethinking of the status of those doctrines.