A Zen anecdote.

A young monk hurried to the master.
“Master, the monks are assembled. They request a sermon.”
The master rose without a word.
He walked to the hall, stepped onto the pulpit, looked out at the gathered monks,
and after a moment’s stillness, stepped down again.
He returned to his chambers.
Puzzled, the young monk followed.
“Master, why did you not give a sermon?”
The master smiled.
“I did,” he said.