Doing and Being: An Interpretation of Aristotle's Metaphysics ThetaDoing and Being confronts the problem of how to understand two central concepts of Aristotle's philosophy: energeia and dunamis. While these terms seem ambiguous between actuality potentiality and activity capacity, Aristotle did not intend them to be so. Through a careful and detailed reading of Metaphysics Theta, Beere argues that we can solve the problem by rejecting both actuality and activity as translations of energeia, and by working out an