But what is praised (in the Upanishads) is the Highest Brahman, and in it there is the triad. The Highest Brahman is the safe support, it is imperishable. The Brahma-students, when they have known what is within this (world), are devoted and merged in the Brahman, free from birth.

In plain words: What the scriptures praise most is the Highest Brahman, the one ultimate reality. It holds a group of three within it. It never perishes and is a safe support. Students who come to know what is inside this world become devoted, merge into Brahman, and are not born again.