According to Osho, human effort is necessary but not sufficient: effort prepares, purifies, and opens you—turns the pot upright—while realization itself descends as grace. By effort you invite and become receptive to grace; by grace you attain God. Half the journey is disciplined readiness; the completion is effortless surrender when the ego drops and the divine rains into an open heart.
Clean your room and open the window (your effort); the cool breeze (grace) comes by itself and refreshes you.