There is a difference between being unconcerned when it is possible to be concerned and being unconcerned because concern is not a characteristic of its being.

There is a difference between being unconcerned when it is possible to be concerned and being unconcerned because concern is not a characteristic of its being. Indifference/difference is to nature what north and south are to the Sun: logically ill-formed. There is no boundary between nature and other things, nature is all encompassing. There is nothing in nature that can be indifferent because nature can't be different from anything.