Complex sentence: The verses 3.6 to 3.8 of the "Bhagavad Gita" state that the action can be either be motivated by body or manipulated by external influences, or it can be motivated by one's true self (soul, Atman, Brahman).
Split into simpler sentences: The verses 3.6 to 3.8 of the "Bhagavad Gita" state that the action can be be motivated by body or manipulated by external influences. Alternatively, it can be motivated by one's inner reflection and true self (soul, Atman, Brahman).