Verse 20

संप्रत्येवानुभूतत्वात्सत्त्वाप्त्या तन्वसंयुतः ।सरूपोऽसौ मनोनाशो जीवन्मुक्तस्य विद्यते

In plain words

Because it is experienced even now, and is joined with the body through the attainment of sattva, this destruction of mind that belongs to the jīvanmukta is the one 'with form' (sarūpa).