摩訶止觀 9.44

9.44

The mind generating joy and the mind collecting itself: the former joy arose from the thirty-six substances, whereas here one directly generates joy with respect to the mind; thus we know it matches the second dhyāna. The Mahāsaṃnipāta explains that the second dhyāna has only three factors, lacking internal clarity. Now generating joy in the mind seems similar in sense to this. As for collecting: if joy stirs, it scatters; if one collects it, one attains entry into one-pointedness of mind. The fundamental has only internal clarity and experiencing joy; the extraordinary possesses the wisdom of contemplation and constantly collects the joyful mind. The mind generating liberation matches the third dhyāna. The pleasure of the fundamental is an attached joy experienced throughout the whole body, which ordinary persons find difficult to relinquish; the extraordinary possesses the wisdom of contemplation and is thus free from craving and attachment, hence it is called "liberation." From the mind generating joy to the mind generating liberation, all are the smṛtyupasthāna of mind.