"Whenever a thought of any kind appears in your mind, observe
its nature and let it fade away. This is the mind's natural way,
which keeps you fresh and healthy. If a negative thought appears,
do not cling to it in order to prolong its peculiar thrill. That
is blockage and self-injury, which few human beings see as injury
because they call it excitement. Your mind should flow like a
river, free and unobstructed, and when it does, your life as a
whole will flow with equal ease."
Secrets for Higher Success, p. 143