Your conscious mind need not know your Divine Purpose. Your soul knows and is guided by The Universe. Your conscious mind will take action on what your soul shares with you. Whether a whisper or a shout, it is there.
I use to be able to do this, but never attempted on a rock! “Yoga is the cessation of the movements of the mind. Then there is abiding in the Seer's own form.” ― Patanjali, The Yoga Sutras of Patanjali