摩訶止觀 8.131

8.131

安心者：若人道場病時，如上所說，體解發心，端身正念，唯止唯觀。善巧悉檀，調適得所，一上坐即覺清涼。或頓損，或漸損，是名「大藥」。更不紛擾修餘治法也。

Calming the mind: When a person in the bodhimaṇḍa becomes ill, as described above, they understand through embodiment and arouse the mind, upright in body and correct in mindfulness, practicing solely calming and contemplation. Skillfully employing the siddhāntas and attuning properly, as soon as one takes the seat one perceives coolness. Whether it diminishes suddenly or diminishes gradually, this is called the "great medicine." One need not fussily practice other remedies.