Plotinos: Complete Works, v. 4 / In Chronological Order, Grouped in Four Periods

A sequence of philosophical essays investigates what it means to live well and to be happy, testing rival definitions such as pleasure, conformity to nature, sensation, and the rational life. The arguments ask whether animals or plants could qualify as happy under these accounts and distinguish mere felt pleasure from the claim that happiness requires knowledge, judgment, or intellectual apprehension. The texts critique views that reduce the Good to sensation or to reason as an instrumental tool and advance the position that true happiness depends on intrinsic interior qualities and higher faculties rather than on external conditions or mere physiological states.