The Ashtavakra Gita was written in around the same time as the Bhagavad Gita (about 2500 years ago). They are fairly different in approach. The Ashtavakra Gita is about radical non-dualism - Advaita Vedanta - like the Upanishads are, like Kashmi
Chapter 2 of the Bhagavad Gita describes more than any other chapter the basic philosophy of the poem. Basically this chapter is about being brave in the face of life..and taking action, rather than falling into depression and a sense of futility.
In earlier sutras Patanjali states that to move towards samadhi one needs faith, courage, intense desire and effort, strong will, energy, memory and higher intelligence; he also says some people come to it natur
They mean Threads or Primal Energy Flows. There are three ~ Sattwa, Rajas, and Tamas. We are always being affected energetically speaking by these ''flows''. I will put in a more detailed post on Gunas