When we want to vocalise these vowels for an hour do we say it in our heads or out because, master samael said:
"I would then inhale with supreme eagerness the Christonic Prana, the vital breath of the mountains, and then I would slowly exhale while making the resounding of the correspondent vowel.
For better clarity, I state that each vowel was preceded by an inhalation and was only resounding in the exhalation (it is obvious that I was inhaling through the nostrils and exhaling through the mouth)."
So does this imply it is more effective out loud?
Thank you