The 40th volume of published proceedings of the Boston Area Colloquium in Ancient Philosophy contains five papers and commentaries presented during academic year 2024–25. Topics: Michael of Ephesus’s commentary on book ten of Nicomachean Ethics and his interpretation of happiness; the causal power of the Prime Mover in producing a good cosmos; Plato’s mathematical intermediates and theory of Forms; Cicero’s Academic skepticism in relation to eudaimonism and his dedication to the pursuit of truth; Aristotle’s triadic account of motion and the teleological desire of matter for form in relation to Plato’s account of motion. The commentators subject each paper to critical review, and they support, challenge, or reject what they find.