ion of
thought and can be exercised only by the conscious use of Will-Power. You
ought to be able to concentrate upon one subject of thought, study and
observation with undivided attention and then take your mind off that
subject and put it on something else, at your will. Train your mind to
'give' perfect attention to any subject you like and also to 'shut off'
or inhibit all attention on that subject. The mind is a restless thing
darting from one thing to another, and, like a spoilt child, tiring of
continued attention. But you must, by Will-Exercise, get control over
this tendency. 'Exercise develops power. Practice makes perfect.' This
you must bear in mind and, by patience and perseverance, train your mind
to 'pay attention' where it ought to do so and not to pay attention where
it ought not to. At first your mind will rebel like an unbroken horse
at the imposition of such restraint. But really all greatness results
from mind-control. _Remember active mentation is conscious, deliberate
concentration. Passive mentation represents automatic, involuntary
thinking._ This includes the subconscious or 'habit' mind. When a certain
thought-groove has been formed in your mind, energy flows into it
involuntarily, _i.e._, by itself and without any conscious effort on your
part. This is passive mentation. It is automatic mental activity. Take an
example. Some school-boys find Mathematics, Science and Geography
easy to master from the very start. They feel quite in sympathy with the
teacher of Mathematics. But History and Language are their abomination.
There are others who simply cannot 'take an interest' in any
Mathematics but who shine brilliantly in Language, Recitation,
Composition, History. As a matter of fact neither of these students is
superior to the other, but each is great in his own line. In one set, you
have an example of automatic mentation in Mathematics, Science and
Geography; in the other in Literature and Art. But suppose the first set
tried to master Literature and Art and the second grappled with
Mathematics and Science, each would then be practising actual
concentration. In each set the active function would be exercised and
will-power would develop on both sides. Do you see? Occultists say that
all power results from the continual exercise of active mentation
and all weak-mindedness is the direct outcome of this wool-gathering,
castle-building, inattentive habit which is an extension of passive
mentation i