 Averroes solves the conflict in an original way, he ranges Prime Matter and passive potencies against efficient causes and active potencies. Passive potencies are in principle indifferent to a certain action and they are the reason why contingent actions may take place or not likewise. Active potencies, on the contrary, follow rules so that their actions are not equally contingent but usually happen. A further distinction between essential and accidental causality helps him to explain generally and rarely occurring actions (LC 67GK TC49). Under another aspect, the agent, or efficient cause, necessarily produces the effect in the case of eternal beings and generally does it in the beings that come-to-be (LC 75D TC74).