into the methods of practising Pratyahara. It sounds perhaps, at first, as if 
Pratyahara were off the main line of attainment in Yoga. This is not so, 
because it enables one to deal with the new conditions which are 
established in the mind by realisation of Dhyana and Samadhi. 
     I can now describe the elementary practices. 
     You should begin with very short periods; it is most important not to 
overstrain the apparatus which you are using; the mind must be trained 
very slowly. In my early days I was often satisfied with a minute or two at 
a time; three or four such periods twice or three times a day. In the 
earliest stages of all it is not necessary to have got very far with Asana, 
because all you can get out of the early practices is really a 
foreshadowing of the difficulties of doing it. 
     18. I began by taking a simple geometrical object in one colour, such 
as a yellow square. I will quote the official instructions in The Equinox. 
     "Dharana—Control of thought." 
     "1. 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. 
     "2. Proceed to combinations of single objects; e.g., a black oval within 
a yellow square, and so on. 
     "3. Proceed to simple moving objects, such as a pendulum swinging; a 
wheel revolving, etc. Avoid living objects. 
     "4. 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 flywheels, eccentrics and governor.) 
     "5. During these practices the mind must be absolutely confined to the 
object determined on; no other thought must be allowed to intrude upon 
the consciousness. The moving systems must be regular and harmonious. 
     "6. Note carefully the duration of the experiment, 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. 
     "7. Proceed to imagine living objects; as a man, preferably some man 
known to, and respected by, you. 
     "8. In the intervals of these experiments you might 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 or roses, the feeling of 
velvet, the sound of a waterfall, or the ticking of a watch. 
     "9. 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." 
     19. Now one of the most interesting and irritating features of your 
early experiments is: interfering thoughts. There is, first of all, the 
misbehaviour of the object which you are contemplating; it changes its