Anyone who has spent any time looking into the Bhagavad-Gita knows that in the first chapter there are countless characters named who all represent different facets of our personalities which are either an impediment or a boon toward our spiritual progress. The Kurus represent the impediments and the Pandavas represent the boons.
Note: Even Arjuna, a Pandava, exhibited a great amount of insecurity and apprehensiveness.
But I am interested in the very first lines of the Gita before it moves to the battlefield of Kurukshetra. They take place in the chamber of Dhritarashtra (who represents spiritual blindness). He is asking Sanjaya what is happening on the battlefield. Sanjaya, with divine sight is able to see what went on, intuitively.
Sanjaya represents unbiased introspection. Though the point of meditation at night is not to re-live our day, it is beneficial to have an unbiased look at whether we “won the battle” over the senses, desires, ego, etc. So every day, you can experience the very yogic principle which Vedavyasa was putting forth in the introduction to the Bhagavad-Gita.
When, in meditation, you find that you are observing your thoughts rather than thinking them, that is Sanjaya.