The experience of arguing with another whose preconceived idea is so
firmly fixed that the argument is nothing but a series of circles,
might be funny if it were not sad; and it often is funny, in spite
of the sadness.

Suppose we should insist upon retaining an unpleasant
brain-impression, only when and so long as it seemed necessary in
order to bring a remedy. That accomplished, suppose we dropped it on
the instant. Suppose, further, that we should continue this process,
and never allow ourselves to repeat a disagreeable brain-impression
aloud or mentally. Imagine the result. Nature abhors a vacuum;
something must come in place of the unpleasantness; therefore way is
made for feelings more comfortable to one's self and to others.

Bad feelings cause contraction, good ones expansion. Relax the
muscular contraction; take a long, free breath of fresh air, and
expansion follows as a matter of course. Drop the brain-contraction,
take a good inhalation of whatever pleasant feeling is nearest, and
the expansion is a necessary consequence.

As we expand mentally, disagreeable brain-impressions, that in
former contracted states were eclipsed by greater ones, will be
keenly felt, and dropped at once, for the mere relief thus obtained.

The healthier the brain, the more sensitive it is to false
impressions, and the more easily are they dropped.

One word by way of warning. We never can rid ourselves of an
uncomfortable brain-impression by saying, "I will try to think