The four successive arupa jhanas, which can only be achieved in this order, are:
- Akasanancayatana jhana - a meditative state where the mind contemplates the infinity of space.
- Vinnanancayatana jhana - a meditative state where the mind is absorbed in realizing that consciousness is infinite.
- Akincannayatana jhana - a meditative state where the mind contemplates the idea that nothing is there.
- Nevasannanasannayatana jhana - a meditative state of neither perception nor non-perception.
The arupa jhanas are said to possess two key qualities:
- Upekkha - a Pali word for "equanimity," where the opposition between comfort and discomfort disappears.
- Ekagrata - a word meaning "single-pointedness" or "very deep concentration," excluding all external stimuli.