The power of will should be exercised only by the highest faculties and curbed by the sentiments, or it will hold the reins and misguide the judgment, and let loose the propensities. To guard and govern the thoughts is the province of the higher faculties that alone act upon the body beneficially. Will-power is capable of all evil, and can never heal the sick for it is the prayer of the unrighteous; but the exercise of the higher sentiments, hope, joy, and love is the prayer of the righteous, and their action, governed by science instead of sense, is the prayer that heals the sick.