Introduction
The common theme so far discussion is about tvam padartha shodhanam - discussion about the self(Jiva)
The next six adhyas are going to talk about Brahman which is basically Tat
1st chapter - all about Arjuna what
2nd chapter -
2.16 The unreal can never come into being, the real never ceases to be. The conclusion about these two is seen by the seers of truth.
Yajnam - spirit of yajna is karmayoga as an offering to the samishti
English Translation Of Sri Shankaracharya's Sanskrit Commentary By Swami Gambirananda
7.1 O Partha, mayi asaktamanah, having the mind fixed on Me- one whose mind (manah) is fixed (asakta) on Me (mayi) who am the supreme God possessed on the alification going to be spoken of-. Yogam yunjan, practising the Yoga of Meditation, concentrating the mind-. Madasrayah, taking refuge in Me-one to whom I Myself, the supreme Lord, am the refuge (asraya) is madasrayah-. Anyone who hankers after some human objective resorts to some rite such as the Agnihotra etc., austerity or charity, which is the means to its attainment. This yogi, however, accepts only Me as his refuge; rejecting any other means, he keeps his mind fixed on Me alone. Srnu, hear; tat, that, which is being spoken of by Me; as to yatha, how, the process by which; you who, having become thus, jnasyasi, will know; mam, Me; asamsayam, with certainty, without doubt, that the Lord is such indeed; and samagram, in fullness, possessed of such alities as greatness, strength, power, majesty, etc. [Strength-physical; power-mental; etc. refers to omniscience and will.] in their fullness.