The famous Greek physician Hippocrates administered musical treatments to his patients in 400 B. C. Although this type of treatment did not originate with him, it found in him an exponent of the highest order. With the increasing materialism of Western civilization, the major tenants of ancient musical therapy have been either forgotten or discarded.
Much more surprising things can happen to anyone who, when a disagreeable or discouraged thought comes into his mind, just has the sense to remember in time and push it out by putting in an agreeable, determinedly courageous one. Two things cannot be in one place.