Chānd-Mül, 1879-845. 'Breath is Brahman, Ka (pleasure) is Brahman, Kha (ether) is Brahman.'
He said: 'I understand that breath is Brahman, but I do not understand Ka or Kha.'
They said: 'What is Ka is Kha, what is Kha is Ka.' They therefore taught him Brahman as breath, and as the ether (in the heart).