--- - |2+ Abstract Objective When facing setbacks and obstacles, the dualistic model of passion outlines that obsessive passion, and not harmonious passion, will predict greater levels of defensiveness. Our aim was to determine whether these passion dimensions predicted defensiveness in the same way when confronted with threatening messages targeting the decision to pursue a passion. Method Across four studies with passionate Facebook users, hockey fans, and runners (total N = 763), participants viewed messages giving reasons why their favorite activity should not be pursued. Participants either reported their desire to read the messages (Studies 1 and 2) or evaluated the messages after reading them (Studies 3 and 4). Results Harmonious passion consistently predicted higher levels of avoidance or negative evaluations of the messages. These responses were attenuated for participants who had previously affirmed an important value (Study 1), or who were told that they do not control the passions they pursue (Study 4). Conclusions Harmonious passion entails a sense of autonomy and control over activity engagement, which usually leads to nondefensive behavior. However, this sense of control may elicit more defensive responses from more harmoniously passionate individuals when the decision itself to pursue an activity is under attack. - Journal of Personality, EarlyView.