"The second school of yoga is that of Shri Krishna, particularly expounded in the great poem the Bhagavad-Gita... This teaches above all else the doctrine of love. The disciple Arjuna, to whom the Guru spoke, was a great lover of mankind; according to the scripture this great soldier sank down upon the floor of his chariot before the battle of Kurukshetra began, full of sorrow because he loved his enemies and could not bear to injure them. The teacher Shri Krishna then explained to him, amid much philosophical teaching, that the greatest thing in life is service, that God himself is the greatest server—for he keeps the wheel of life revolving, not because any benefit can possibly accrue to him in consequence, but for the sake of the world—and that men should follow his example and work for the welfare of mankind. Many Great Ones, he said, had reached perfection by following this path of life, by doing their duty without personal desire. To love without ceasing is the way of the second Ray; in the Gita it is shown how this love should be directed to men and other beings in karma yoga (the yoga by action or work) and to God in bhakti yoga (the yoga by devotion)."