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Can someone please SIMPLY explain the EIGHT Jhanas, specifically:
1) What are Jhanas meant to do & why would one want to achieve them?
2) How does one specifically achieve them (instructions please)?
3) What happens in each individual Jhana, from the first to the eighth?
4) How can I explain the Jhanas to a newcomer of the Dhamma?
Please use scripture to back up your answers, but don't make your whole answer scripture...