བཏང་སྙོམས་ཏེ། དེ་དག་ནི་ཚད་མེད་པ་བཞི་ཞེས་བྱའོ། །
“If you ask what are the ‘four formless meditative absorptions,’ they comprise (1) the meditative absorption of the sense field of infinite space, (2) the meditative absorption of the sense field of infinite consciousness, (3) the meditative absorption of the sense field of nothing-at-all, and (4) the meditative absorption of neither perception nor non-perception.
Meditative absorption, non-apprehension, perfection