Hindus subscribe to a diversity of ideas on spirituality and traditions, but have no ecclesiastical order, no unquestionable religious authorities, no governing body, nor a single founding prophet; Hindus can choose to be polytheistic, pantheistic, monotheistic, monistic, agnostic, atheistic or humanist. Because of the wide range of traditions and ideas covered by the term Hinduism, arriving at a comprehensive definition is difficult. The religion "defies our desire to define and categorize it". A Hindu may, by his or her choice, draw upon ideas of other Indian or non-Indian religious thought as a resource, follow or evolve his or her personal beliefs, and still identify as a Hindu.