दुःखदौर्मनस्याङ्गमेजयत्वश्वासप्रश्वासाः विक्षेप सहभुवः ॥३१॥
duḥkha-daurmanasya-aṅgamejayatva-śvāsapraśvāsāḥ vikṣepa sahabhuvaḥ ॥31॥
Suffering, depression, nervousness, and agitated breathing are signs of this lack of clarity. ||31||
Patanjali’s Yoga Sutras about enlightenment – Samadhi Pada.