tusita is that heaven , that elsewhen closest to earth , whereso the same story tellsthe most joyful of devas dwell , and it is also the heaven where the bodhisatta setaketu lived before , some thousands of years ago , he was reborn as siddhattha gotamawho , as you may know , refused to rise from beneath the bodhi tree until he knew , and in that giant act of will succeeded in so knowing and became the buddha kyamuni .