Nature and spirit.

parkrtim purusam cai va,viddhy anadi ubhav api,
vikarams ca gunams cai va,viddhi prakrtisambhavan.--19
Know thou that parkrti[nature]and pursha[soul]are both beginningless;and know also that the forms and modes are born of prakrti[nature].
These two forms 'parkirti'[nature]and pursha are beginningless.this formation of universe is of five elements as Earth,water,air,fire and space.that is called elements of parkirti[nature]our body is also formation of thhese elements.we should consider as known.that is called as parkirti.[nature]we can not create it nor destroyed.but 'pursha'.but knower of the field is our soul.it is one in all beings.this formation of every thing is from these two elements 'parkrti'and'pursha'.simply meaning parkrti[field]and pursha[knower of the field].
through possession of the two nature and soul,Ishvra causes the origin, preservation and and dissolution of the universe.