首楞嚴義疏注經 1.375

1.375

佛言：「汝言中間，中必不迷，非無所在。今汝推中，中何為在？為復在處？為當在身？」

The Buddha said: "When you speak of 'the middle,' the middle must certainly not be vague, nor without a location. Now as you deduce the middle, where is this middle located? Is it in a place, or is it in the body?"