Mediaeval philosophers often made much of the distinction between willing or intending to do a thing and actually doing it. Let \(A\) be any action that a human being might contemplate, choose, and want to execute. Then person \(P\)’s willing \(A\) is considered an interior act with respect to \(A\), because the willing is internal to the human soul. This is meant to contrast with the corresponding exterior act, that is, the event that \(P\) actually executes \(A\). Note that \(A\) itself may be in some sense ‘interior’, e.g., let \(A =\) thinking well of my enemy. Then, although \(A\) is itself internal inasmuch as thinking takes place in my mind, nevertheless we can distinguish the interior act of willing to think well of my enemy from the exterior act thinking well of my enemy. Thus ‘interior’ and ‘exterior’ here signify primarily the distinction between choosing to do \(A\) and doing \(A\), not so much the internal and external activities per se.