To enjoy health and harmony we need to be constant affirmers of what's spiritual and good and to be vigorous challengers of the opposite.
Now, that's a bold statement, but one that can be proved.
To illustrate, a woman fell against the edge of a bathtub, apparently breaking three ribs in the process. As a student of Christian Science she had learned of God's infinite goodness and her inseparable relationship to Him as His complete expression. Now she recognized that she had to quickly rededicate her thought to this truth of her being.