3.

The Gita is the Song Celestial, sung by Lord Krishna himself. The Gita is the essence of all Indian scriptures. There are eighteen soul-illumining discourses in the Gita. In the eleventh one, Lord Krishna reveals to his beloved disciple, Arjuna, his Visva-Rupa, his Universal Form. On seeing this overpowering sight, this Divine Form, the surrendered disciple in Arjuna cries out:

Tvamadi Deva Purusha Purana...

Thou art the ancient Soul,
The first and original Godhead,
And the Supreme resting place of all that lives;
Thou art the Knower and the Known; the Highest Abode.
O infinite in form, by Thee the Universe was extended.
Thou art Vayu and Yama and Agni and Soma and Varuna and Prajapati,
Father of creatures and the great-grandsire,
Salutation, Salutation to Thee,
A thousand times over and again,
And yet again, Salutation,
Again and again, Hail unto Thee.

(From the Bhagavad-Gita: XI.38-39)