Every Living Being has a Particular Relationship with the Lord Eternally.

Arjuna was in a relationship with the Lord as friend. Of course there is a gulf of difference between this friendship and the friendship found in the material world. This is transcendental friendship, which cannot be had by everyone. Of course everyone has a particular relationship with the Lord, and that relationship is evoked by the perfection of devotional service. But in the present status of our life, not only have we forgotten the Supreme Lord, but we have forgotten our eternal relationship with the Lord. Every living being, out of the many, many billions and trillions of living beings, has a particular relationship with the Lord eternally. That is called svarüpa. By the process of devotional service, one can revive that svarüpa, and that stage is called svarüpa-siddhi—perfection of one's constitutional position. So Arjuna was a devotee, and he was in touch with the Supreme Lord in friendship.