 In this passage, Avicenna states that natural efficient causes do not “bestow any existence other than motion in one of the forms of motion” and that “in the natural sciences, that which bestows existence is a principle of motion”. These statements suggest that natural efficient causes do bestow existence, albeit in an inferior way. So, Avicenna considers his definition of the efficient cause as a giver of being to another to encompass both natural agents and creative agents.