The Breath - The Name Of God
The use of vanus in the original text could be thought of as ... "To speak something in vain is to speak it with emptiness, with futility; it's a waste of time."

From “Becoming Stillness - Richard Rohr”
Link to the full talk:
   • Becoming Stillness -  Richard Rohr  

Short definition of vanus:
vanus, containing nothing, empty, void, vacant
https://logeion.uchicago.edu/vanus