Constrain the mind to concentrate itself upon a single simple object imagined.
The five tatwas are useful for this purpose; they are: a black oval; a blue disk; a silver crescent; a yellow square; a red triangle.
Proceed to combinations of simple objects; e.g., a black oval within a yellow square, and so on.
Proceed to simple moving objects, such as a pendulum swinging, a wheel revolving, &c. Avoid living objects.
Proceed to combinations of moving objects, e.g., a piston rising and falling while a pendulum is swinging. The relation between the two movements should be varied in different experiments.
Or even a system of fly-wheels, eccentrics, and governor.
During these practices the mind must be absolutely confined to the object determined upon; no other thought must be allowed to intrude upon the consciousness. The moving systems must be regular and harmonious.
Note carefully the duration of the experiments, the number and nature of the intruding thoughts, the tendency of the object itself to depart from the course laid out for it, and any other phenomena which may present themselves. Avoid overstrain; this is very important.
Proceed to imagine living objects; as a man, preferably some man known to, and respected by, yourself.
In the intervals of these experiments you may try to imagine the objects of the other senses, and to concentrate upon them.
For example, try to imagine the taste of chocolate, the smell of roses, the feeling of velvet, the sound of a waterfall, or the ticking of a watch.
Endeavour finally to shut out all objects of any of the senses, and prevent all thoughts arising in your mind. When you feel you have attained some success in these practices, apply for examination, and should you pass, more complex and difficult practices will be prescribed for you.