Arjuna saw his revered elders like Bhishma and Gurus like Dr6na, relatives and friends,
against him, he felt very bad about having to fight them and
possibly kill them. So he threw down his bow, as he did not like to win the war at the
cost of their lives.
Sensing the state of Arjunas mind, Krishna cleared his doubts and misgivings in a
variety of ways.
In the end, Krishna revealed himself as the Lord Almighty and said:
"I am Time the Destroyer, come to destroy those ranged against
you. You are only My instrument. Therefore, do not feel disheartened. Slay your foes
without remorse, that is your Dharma and you shall conquer, for they are already slain by
Arjuna who saw Krishnas Viswaroopa or cosmic form, was frightened and begged him to
reassume his human form. Krishna did so.