Verse 42

जीवन्मुक्ता महात्मानो ये परावरदर्शिनः ।तेषां या चित्तपदवी सा सत्त्वमिति कथ्यते

In plain words

Those great souls, liberated while living, who see both the higher and the lower reality -- the state of citta that is theirs is called sattva.