On reflection, this is mistaken, but it does provide a clue to Locke’s conception of voluntariness. The mistake (of which Locke likely became aware, given that the statement clashes with the rest of his views and was removed from E2–5) is that not every instance of willing an action is followed by the action itself.  To use one of Locke’s own examples, if I am locked in a room and will to leave, my volition will not result in my leaving (E1–5 II.xxi.10: 238). So willing cannot signify the “actual producing” of a voluntary action. However, it is reasonable to assume that, for Locke, willing will “produce” a voluntary action if nothing hinders the willed episode of motion or thought. And this makes it likely that Locke takes a voluntary action to be not merely temporally consequent to, but actually caused by, the right kind of volition (Yaffe 2000; for a contrary view, see Hoffman 2005).