Cattāri Jhānāni
CHAT-taa-ri jhaa-NAA-ni（察他里 者那尼）
【一句話】
四禪：深度專注嘅四個層次，由有喜樂、到捨念清淨——正定嘅具體內容。
【生活例子】
潛水落海，越潛越深，水面嘅浪（五蓋、雜念）越嚟越遠，四周越嚟越靜越穩。四禪就係心一層層潛入定境嘅四個深度。
【佛陀點講】
Sukhassa ca pahānā dukkhassa ca pahānā pubbeva somanassadomanassānaṁ atthaṅgamā adukkhamasukhaṁ upekkhāsatipārisuddhiṁ catutthaṁ jhānaṁ upasampajja viharati.
「捨斷樂與苦，先前的喜與憂已滅沒，進入並安住於不苦不樂、捨念清淨的第四禪。」
Giving up pleasure and pain, and ending former happiness and sadness, one enters and remains in the fourth absorption, without pleasure or pain, with pure equanimity and mindfulness.
— 出處 MN 141 →