Text 1

arjuna uvaca
kim tad brahma kim adhyatmam
kim karma purushottama
adhibhutam ca kim proktam
adhidaivam kim ucyate

Translation

Arjuna inquired: O my Lord, O Supreme Person, what is Brahman? What is the self? What are fruitive activities? What is this material manifestation? And what are the demigods? Please explain this to me.

Commentary by Srila Prabhupada

In this chapter Lord Krishna answers different questions from Arjuna, beginning with “What is Brahman?” The Lord also explains karma (fruitive activities), devotional service and yoga principles, and devotional service in its pure form. The Srimad-Bhagavatam explains that the Supreme Absolute Truth is known as Brahman, Paramatma and Bhagavan. In addition, the living entity, the individual soul, is also called Brahman. Arjuna also inquires about atma, which refers to body, soul and mind. According to the Vedic dictionary, atma refers to the mind, soul, body and senses also. 

Arjuna has addressed the Supreme Lord as Purushottama, Supreme Person, which means that he was putting these questions not simply to a friend but to the Supreme Person, knowing Him to be the supreme authority able to give definitive answers.

Commentary by Sri Visvanatha Cakravarti Thakur

Please see text 2 for Sri Visvanatha Cakravarti Thakur's combined commentary to texts 1 and 2.