In this article I argue that Aristotle’s discussion of chance in the Physics gives an important contribution to the theory of action put forward in the Nicomachean Ethics, in particular as regards its notion that man is himself the origin or ground of his actions. Whereas the ethical works show a tendency to explain this notion in objective and causal terms, the account of chance as the happening of the unexpected not only points to the essential finitude of all human (...) conduct, but also indicates that the concept of ground in connection with human agency must be understood in subjective terms, or in the direction of sense-giving and responsibility. (shrink)