Many who are experienced in plant life know how responsive plants are to the sympathy of the person who lives with them and looks after them. It has been proved that plants breathe; and if breath is to be found in plant life, certainly there is intelligence too. I once happened to see a stone whose owner called it a magic stone, but in reality it was quite ordinary; only it often changed its color and shade, especially when a particular person held it. So even a stone can respond to a person's mind, and this teaches us that there is a great deal to explore in the mineral kingdom. This is not a discovery of today; it was known to the people of ancient times. We read in the Persian poems of Jalaluddin Rumi that God slept in the mineral kingdom, dreamed in the vegetable, became conscious in the animal, and realized Himself in the human being.