Averroes was another important philosopher, and while he was born shortly before Avempace's death, Averroes later in life would be in opposition to Avempace's theories the majority of the time. Avempace starts with a good kinematic definition of motion and construes it as a force. According to Avempace regarding freely falling objects, what is moved as the heavy body falls, is the heavy body and what moves it downward is its 'gravity' or its 'form' or 'nature'.