The short answer to the question whether ‘self-causation’ or ‘causa sui’ are appropriate
terms in the Platonic context is that they come closest to an adequate translation
of the term αὐτὸ καθ’ αὑτὸ. Hence, they have been used in discussions of the Platonic
Forms, or of Platonic and Neo-Platonic principles such as ‘the One’ and ‘the Good’.3
3 See e.g. Bene (2013, p. 149, n. 43) and Ousager (2005, pp. 123-47, 177-80).
Parashkevova Desislava. A conceptual history of the idea of self-causation: from Plato's
forms to Hegel's concrete universal. (2015)