He perceived that understanding (vignana) was Brahman, for from
understanding these beings are born; by understanding, when born, they
live; into understanding they enter at their death.
Having perceived this, he went again to his father Varuna, saying:
“Sir, teach me Brahman.” He said to him: “Try to know Brahman by
penance, for penance is (the means of knowing) Brahman.”
He performed penance. Having performed penance—