So we see that Bhagavad-gītā is instructed to Arjuna especially because Arjuna was a devotee of the Lord, a direct student of Kṛṣṇa, and His intimate friend. Therefore Bhagavad-gītā is best understood by a person who has qualities similar to Arjuna's. That is to say he must be a devotee in a direct relationship with the Lord. As soon as one becomes a devotee of the Lord, he also has a direct relationship with the Lord. That is a very elaborate subject matter, but briefly it can be stated that a devotee is in a relationship with the Supreme Personality of Godhead in one of five different ways:
1. One may be a devotee in a passive state;
2. One may be a devotee in an active state;
3. One may be a devotee as a friend;
4. One may be a devotee as a parent;
5. One may be a devotee as a conjugal lover.
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.