Seminar "Song of God, or the most sacred knowledge".
Overview of the greatest tractate of antiquity - the Bhagavad-gita.
"This knowledge - the king of the knowledge, the most secret of secrets. It is - The purest knowledge, and because it gives the person a live experience of understanding the nature of his "I", it is a perfect religion. Knowledge is eternal, and the comprehension of it is a joy.".

Bhagavad-gita 9.2