Fourfold Limitlessness

From Zenwiki
(cattāso appamaňňāyo, catvāry-apramānāni, 四無量(心)) are 1) friendship (mettā, maitrī, 慈), 2) compassion (karuņā, 悲), 3) joy (muditā, 喜), 4) equanimity (upekkhā, upekşā, 捨:casting, renunciation).