Avoiding Vice and Pursuing Virtue: Kant on Perfect Duties and ‘Prudential latitude’

To fulfill a perfect duty an agent must avoid vice, yet when an agent refrains from acting on a prohibited maxim she still must do something. I argue that the setting of morally required ends ought to consistently inform an agent's judgment regarding what is to be done beyond compliance with perfect, negative duties. Kant's assertion of a puzzling version of latitude of choice within his discussion of perfect duties motivates and complicates the case I make for a more expansive interpretation of the duty to pursue virtue.