Then there are twin souls of another kind which belong to the earth, the world, the human sphere. The nature of these twin souls is different; they must develop to become twin souls. And what develops them is the situation in life that brings them together; they are drawn to each other by providence, and circumstances cause them to meet. As they develop they become twin souls, just as in one shell one can sometimes find two almonds. The shell has been the situation, the circumstances, the mold which has brought them together in order to go through life tolerantly.