ercise I know of because you do not overdo your
strength.

Walking is beneficial because when you walk alone you give your brain a
rest. You cannot read the papers, you cannot talk, and your mental
apparatus gets complete rest.

As stated in PEP I walk from my home to my office, something less than
four miles, and it takes me about an hour to make the trip. I walk
through a beautiful park and every morning I see something new and
interesting in bird and animal life, in the vegetation and in the
geological formations through which I pass.

I recommend that you walk anywhere from three to four miles in the
morning.

If your home is more than four miles from the office, walk three or four
miles and then take the car.

Do not walk home in the evening unless the walk is a short one. In the
evening you are tired and you should conserve your strength. In the
morning you are fresh and the exercise comes to you at a time it is most
needed. It will give you strength, courage and help to keep you in a
good mood all day.

I cannot too strongly emphasize the importance of walking alone, for
then you have shifted your nerve energy from the dry cell battery of the
brain to the magneto, which is the spinal cord. The spinal cord works
automatically and it doesn't wear itself out. The brain tires if it uses
its energy.

In walking you use the thought and the brain impulse to start the
magneto then the spinal cord action is automatic.

This automatic action of the spinal cord is a wise provision of nature
to conserve strength.

The spinal cord energy is what you might call automatic habit.

For instance, in dressing and undressing yourself you will recall that
you put on or take off your clothes in regular order without giving the
matter any thought. It is just habit.

If you wish to demonstrate the difference between the control of the
physical body by brain impulse and the spinal cord impulse, try this
some morning: Start out on your walk, and mentally frame sentences like
this as you walk, "right step, left step, right step, left step," and so
on; give thought to each step you have taken and notice how tired you
will be when you have gone half a mile.

The next morning start to walk, walk naturally, give no thought to
walking, keep your mind on the beauties of nature by which you are
passing or in pleasant soliloquy and you will feel no fatigue.

There isn't a bit of theory in this chapter; it is positive practical
se