|Chapter 1: Observing the Armies on the Battlefield of Kurukshetra|
evam ukto hrishikeso
senayor ubhayor madhye
Sanjaya said: O descendant of Bharata, having thus been addressed by Arjuna, Lord Krishna drew up the fine chariot in the midst of the armies of both parties.
In this verse Arjuna is referred to as "Gudakesha." "Guda," means sleep and also ignorance. Arjuna as "Gudakesha," is one who had conquered sleep and ignorance. Arjuna, by his determination had overcome sleep and could fight for several days without sleeping. Srila Prabhupada gives the deeper import of this word. He says, "So Arjuna conquered both sleep and ignorance because of his friendship with Krishna. As a great devotee of Krishna, he could not forget Krishna even for a moment, because that is the nature of a devotee. Either in waking or in sleep, a devotee of the Lord can never be free from thinking of Krishna's name, form, qualities and pastimes. Thus a devotee of Krishna can conquer both sleep and ignorance simply by thinking of Krishna constantly. This is called Krishna consciousness, or samadhi."
Please read the Sanskrit Verse and the Prabhupada's Purport.