To fix the mind upon one thing at a time is called Dharana, following proper vows and restraints, the Yogin practises in all seven kinds of Dharana. There are, again, as many sorts of Dharanas originating out of these, upon subjects which are near or distant.
सप्त या धारणाः कृत्स्ना वाग्यतः प्रतिपद्यते। पृष्ठतः पार्वतश्चान्यास्तावत्यस्ताः प्रधारणाः॥