These comprise the attainments of (1) the sense field of infinite space, (2) the sense field of infinite consciousness, (3) the sense field of nothing-at-all, and (4) the sense field of neither perception nor non-perception.

These are typically listed as follows: (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.

These 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.

These comprise the absorptions of (1) the station of endless space, (2) the station of endless consciousness, (3) the station of the nothing-at-all absorption, and (4) the station of neither perception nor nonperception.

These comprise the absorptions of (1) the station of endless space, (2) the station of endless consciousness, (3) the station of the nothing-at-all absorption, and (4) the station of neither perception nor nonperception.

These are typically listed as follows: (1) the attainment of the sense field of limitless space, (2) the attainment of the sense field of limitless consciousness, (3) the attainment of the sense field of nothing whatsoever, and (4) the attainment of the sense field of neither perception nor non-perception.

The four attainments of the formless states are gradually refined and ever more abstract states of consciousness that can be achieved through intensive meditation and ultimately lead to an experience of emptiness that is free from subject-object differentiation. The names of the four attainments are (1) the Sphere of Infinity of Space, (2) the Sphere of Infinity of Consciousness, (3) the Sphere of Nothingness, and (4) the Sphere of Neither Perception nor Nonperception.

As found listed in UT22084-026-001-1640 these comprise (1) the meditative absorption of the sphere of infinite space, (2) the meditative absorption of the sphere of infinite consciousness, (3) the meditative absorption of the sphere of nothing-at-all, and (4) the meditative absorption of neither perception nor nonperception. The four formless absorptions and their fruits are discussed in Jamgon Kongtrul, TOK Book 6, Pt. 2: pp. 436–38.

These are typically listed as follows: (1) the equipoise of the sense field of infinite space, (2) the equipoise of the sense field of infinite consciousness, (3) the equipoise of the sense field of nothing at all, and (4) the equipoise of neither perception nor nonperception.