摩訶止觀 4.111

4.111

觀心處者，諦理是也。中道之法幽遠深邃，七種方便絕跡不到，名之為「深」；高廣不動，名之為「山」；遠離二邊，稱之為「靜」；不生不起，稱之為「閑」。《大品》云：「若千由旬外，起聲聞心者，此人身雖遠離，心不遠離。」以憒鬧為不憒鬧，非遠離也。雖住城傍，不起二乘心，是名「遠離」。即上品處也。

Regarding the place in terms of contemplating the mind: it is the principle of the truths. The dharma of the middle way is secluded and profound; the seven kinds of expedients have their tracks cut off and cannot reach it, so it is called 'deep.' High, vast, and immovable, it is called 'mountain.' Far removed from the two extremes, it is called 'quiet.' Non-arising and non-originating, it is called 'idle.' The Pañcaviṃśati says: 'If from a thousand yojanas away one gives rise to the mind of a śrāvaka, though this person's body is far removed, their mind is not far removed.' Taking turmoil as non-turmoil is not being far removed. Even if one dwells beside a city, if one does not give rise to the mind of the two vehicles, that is called 'being far removed.' This is the superior place.