Therefore the destination of the Sufi movement is to serve humanity towards this end. It is not a new religion, it is not a certain cast or creed. It is only awakening people of all different religions or of no religion to the divine ideal; to awaken humanity to the understanding of truth, which is to be learned by the understanding of God-especially after such a time as humanity has gone through, while the hatred that exists in the heart of men for one another is ever on the increase. People know about different diseases, but they do not know that the worst disease of the world is the disease of the heart, and it seems that this plague is vastly spreading: the bitterness in the heart. If one could only think what psychological effect the thought of prejudice, of hatred, of bitterness has on man! It is not only outward reasons that make persons ill, but a great many illnesses come from inner reasons. To take in bitterness and to keep it in the heart is worse than keeping a drop of poison in the body.