As knowledge increases, the attitude of science towards the things of the invisible world is undergoing considerable modification. Its attention is no longer directed solely to the earth with all its variety of objects, or to the physical worlds around it; but it finds itself compelled to glance further afield, and to construct hypotheses as to the nature of the matter and force which lie in the regions beyond the ken of its instruments. Ether is now comfortably settled in the scientific kingdom, becoming almost more than a hypothesis. Mesmerism, under its new name of hypnotism, is no longer an outcast.Contents: 1. THE DIFFICULTY OF REPRESENTATION2. THE TWO EFFECTS OF THOUGHTHOW THE VIBRATION ACTSTHE FORM AND ITS EFFECT3. THE MEANING OF THE COLOURS4. THREE CLASSES OF THOUGHT-FORMSILLUSTRATIVE THOUGHT-FORMSVARIOUS EMOTIONSFORMS SEEN IN THOSE MEDITATING5. HELPFUL THOUGHTS6. FORMS BUILT BY MUSIC