(d) The following is the most difficult of the variations or degrees of this exercise, but the ability to perform it will come gradually. The exercise consists in gradually shutting out all thought or impression of the outside world; of the body; and of the thoughts themselves, the student concentrating and meditating upon the word and idea "I AM," the idea being that he shall concentrate upon the idea of mere "being" or "existence," symbolized by the words "I Am." Not "I am _this_," or "I am _that_," or "I _do_ this," or "I _think_ that," but simply: "I _AM_." This exercise will focus the attention at the very centre of Being within oneself, and will gather in all the mental energies, instead of allowing them to be scattered upon outside things. A feeling of Peace, Strength, and Power will result, for the affirmation, and the thought back of it, is the most powerful and strongest that one may make, for it is a statement of Actual Being, and a turning of the thought inward to that truth. Let the mind first dwell upon the word "I," identifying it with the Self, and then let it pass on to the word "AM," which signifies Reality, and Being. Then combine the two with the meanings thereof, and the result a most powerful focusing of thought inward, and most potent Statement of Being. It is well to accompany the above exercises with a comfortable and easy physical attitude, so as to prevent the distraction of the attention by the body. In order to do this one should assume an easy attitude and then relax every muscle, and take the tension from every nerve, until a perfect sense of ease, comfort and relaxation is obtained. You should practice this until you have fully acquired it. It will be useful to you in many ways, besides rendering Concentration and Meditation easier. It will act as a "rest cure" for tired body, nerves, and mind. EXERCISE II.