Stillness is tranquility of the inner life, the quiet at the depths of its hidden stream. Stillness is a collected, total presence, a being all there, receptive, alert, ready.
Mysticism is about being-with-being: being-with-being in silence, in experience, in awe, in connection making, in non-dualism, and also about being with suffering beings, with the victims of self-hate and oppression.
A prophet is a mystic in action.