Stop all physical activity: sit naturally at ease.
Do not talk or speak: let sound be empty, like an echo.
Do not think about anything: look at experience beyond thought.
Your body has no core, hollow like bamboo.
Your mind goes beyond thought, open like space.
Let go of control and rest right there.
Mind without projection is Mahamudra.
Train and develop this and you will come to the deepest awakening.