महतः परमव्यक्तमव्यक्तात्पुरुषः परः। – Kathopanishad

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

Indriyebhyah paraa hyarthaa arthebhyashch param manah.
anasastu paraa buddhirbuddheraatmaa mahaanparah

– Kathopanishad 1.3.11

Greater than the MAHAT (individual self; soul) is the unmanifest (Mother Nature; Paraa Prakriti);
Greater than the unmanifest is the Supreme Soul, Paramatman.
There is nothing greater than the Paramatman (Supreme Soul). He is the greatest.

He is the highest and the best.