"Das Gericht willt Nichts von dir!"

The court receives you when you come, and releases you when you go.

This is the bare source of Purusha, the witness.

Yoga Sutra Vibhuti Pada:

tad vairagyad api dosha bija kshaye kaivalyam ||50||

तद्वैराग्यादपि दोषबीजक्षये कैवल्यम् ॥५०॥

tad-vairāgyād-api doṣa-bīja-kṣaye kaivalyam ||50||

Non-attachment (vairagya) even from that omiscience destroys the foundation of all dysbalances (dosha) and results in liberation (kaivalya). ||50||

tad = (acc. sg. n. /nom. sg. n.) that
vairāgyat = (ab. sg. n. from vairāgya) desirelessness; non-attachment; dispassion
api = (conj./prep.) even 
doṣa = (iic.) impurity; dysbalances 
bīja = (iic.) seed; foundation
kṣaye = (loc. sg. m./acc. du. n./nom. du. n./loc. sg. n. /acc.du. f./nom. du. f . from kṣaya) destruction 
kaivalyam = (acc. sg. n./nom. sg. n. from kaivalya) liberation; enlightenment 

http://www.ashtangayoga.info/source-texts/yoga-sutra-patanjali/chapter-3/item/vairagyad-dosha-bija-kshaye-kaivalyam/