Begin by observing a person filled with a desire for some object. Direct your attention to this desire. It is best to choose a time when this desire is at its height, and when it is not yet certain whether the object of the desire will be attained or not. Then surrender yourself entirely to the contemplation of that which you observe, but maintain the utmost inner tranquility of soul. Make every endeavor to be deaf and blind to everything that may be going on around you at the same time, and bear in mind particularly that this contemplation is to evoke a state of feeling in your soul. Allow this state of feeling to arise in your soul, like a cloud rising on an otherwise cloudless horizon. It is to be expected, of course, that your observation will be interrupted, because the person on whom it is directed will not remain in this particular state of mind for a sufficient length of time. Presumably you will fail in your experiment hundreds and hundreds of times. It is simply a question of not losing patience. After many attempts you will ultimately realize the state of feeling spoken of above as fast as the corresponding mental phenomena pass through the soul of the person under observation. After a time you will begin to notice that this feeling in your own soul is evoking the power of spiritual vision into the psychical condition of the other. A luminous image will appear in your field of vision. And this luminous image is the so-called astral manifestation evoked by the desire-state when under observation. Again we may describe this image as flame-like in appearance. It is yellowish red in the centre and reddish-blue or lilac at the edges. Much depends upon treating such experiences of the inner vision with great delicacy. It will be best for you at first to talk of them to nobody except your teacher, if you have one. The attempt to describe such appearances in appropriate words usually leads to gross self-deception. One employs ordinary terms not applicable to such purposes, and therefore much too gross and clumsy. The consequence is that one's own attempt to clothe this vision in words unconsciously leads one to blend the actual experience with an alloy of imaginary details. It is, therefore, another important law for the occult inquirer that he should know how to observe silence concerning his inner visions. Observe silence even towards yourself. Do not endeavor to express in words that which you see, or to fathom it with reasoning faculties that are inadequate. Freely surrender yourself to these spiritual impressions without any mental reservations, and without disturbing them by thinking about them too much. For you must remember that your reasoning faculties were, at first, by no means equal to your faculties of observation. You have acquired these reasoning faculties through experiences hitherto confined exclusively to the world as apprehended by your physical senses, and the faculties you are now acquiring transcend these experiences.