Mantra 11

महतः परमव्यक्तमव्यक्तात्पुरुषः परः ।पुरुषान्न परं किंचित्सा काष्ठा सा परा गतिः ॥ ११ ॥

In plain words

Higher than the Great [Self] is the Unmanifest; higher than the Unmanifest is the Puruṣa. Beyond the Puruṣa there is nothing at all -- that is the limit, that the highest goal.