The world of things, of energy and matter? Even if there were such a common world of things and forces, it is not the world in which we live. Ours is a world of feelings and ideas, of attractions and repulsions, of scales of values, of motives and incentives, a mental world altogether. Biologically we need very little..., our problems are of a different order. Problems created by desires and fears and wrong ideas can be solved only on the level of the mind. You must conquer your own mind and for this you must go beyond it.