FALL OF THE REPUBLIC
After Yoda heard the voice of long-dead Qui-Gon Jinn, he let the Force guide him to the swamp world of Dagobah, one of the purest places in the galaxy. There, amid Dagobah’s abundant life, he spoke with Qui-Gon’s spirit and took the first steps towards learning to retain his consciousness after death.
Luke kept his promise and returned to Dagobah, where Yoda told him he must confront Darth Vader. The ancient Jedi Master then died, passing into the Force, and Luke spoke with Obi-Wan’s spirit. He was certain – as his mother Padmé Amidala had once been -- that there was still good in Vader.