A beautiful comprehensive introduction of Bhagvad Gita

I think this is the most beautiful comprehensive introduction of Bhagvad Gita I ever came across in a verse from 'Vaishnaviya Tantra Saar':

"Sarvopanishdo Gaavo, Dogdhaa Gopal Nandanah
Paartho Vatsah, Sudhir bhoktaa, Dugdham Gitaamrtam mahou"

Meaning:

“The Upanishads are the cows, and the cowherd's son, Krishna*, is the milker.
Arjuna is the calf, the wise men are the drinkers and the excellent pure nectar-like milk* is Gita.”

Though the cow produces its milk for its calf but is consumed and benefitted by many.  Similarly Bhagvad Gita, although addressed to Arjuna, benefits the whole humanity.

Notes:
1. As we know, Krishna, raised by cowherds, spent his early life as a 'Gopal', (the cowherd), joined his biological royal parents later, and became the king of Mathura.

2.  The Upanishads, many in numbers, have different approach towards the 'Truth'. Gita is a comprehensive synthesis of the seemingly different thoughts such as Non-dualism of the Upanishads, Dualism of the ‘Saankhya’, tender devotion and complete surrender of ‘Bhaagvatam’ and the Yoga of Meditation etc. It's like collecting milk from many different cows and presenting in one pot.

Lord Krishna chooses the method, not of denial like many, but of understanding and shows how these seemingly different lines of thought; Duality of Bhakta and Bhagvaan, of devotion and surrender eventually becomes Non-Duality of Atman and Paramaatman.

                            ‘Rajan Sachdeva’