This lecture discusses key ideas from the ancient Stoic philosopher Seneca's Letters, this one looking at Letter 65

It focuses specifically on his discussions of the types of causes understood from Stoic, Aristotelian, and Platonic perspectives. Seneca enumerates the four Aristotelian causes - material, efficient, formal, and final and adds to these the Platonic model or exemplar. From the Stoic perspective, none of these, except for the efficient cause - understood as the productive reason (ratio efficiens) or God - is really a cause.

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