He [Baal Shem Tov] considered how each created thing, whether a blade of grass, a leaf, a flower, or a stone, is kept in existence every moment by God's will, and, were His will removed, it would immediately disappear. "There is nothing but God!" he repeated aloud countless times, and he frequently uttered a mystic verse that his father had taught him: "He fills all worlds and surrounds all worlds and there is no place where He is not present!"
— Yitzhak Buxbaum, The Light and Fire of the Baal Shem Tov