intellect
In the Gita Dhyanam, the Upanishads are described as the cows, Bhagavan Sri Krishna is described as the milker who brings out the essence of the Upanishads, and Partha (Arjuna) is our calf. Bhaktas (devotees) of purified intellect are the enjoyers of this milk - the great nectar of the Gita!
Gratitude to Arjuna for his fears and doubts, which allowed the essence of the Upanishads to be presented most practically on the battlefield ... of our life!
सर्वोपनिषदो गावो दोग्धा गोपालनन्दनः
पार्थो वत्सः सुधीर्भोक्ता दुग्धं गीतामृतं महत्
sarvopaniṣado gāvo dogdhā gopālanandanaḥ
pārtho vatsaḥ sudhīrbhoktā dugdhaṃ gītāmṛtaṃ mahat