I would like to know how it happened . 1) Like did Rishis , for instance Vishvamitra or Vashishta would give up attachments and go to forests to do penance and then , for how many tens of years they did penance ?
2) How did they come to know a vedic verse came to them ? what was the process of revelation like ?
3) How much portion they got each time ? like just a mantra for 10 years of penance or entire mandala of rigveda ?