"(6) The crystal should not be used soon after taking a meal, and care
should be taken in matters of diet to partake only of digestible foods,
and to avoid alcoholic beverages. Plain and nourishing food, and outdoor
exercise, with contentment of mind, or love of simplicity of living, are
great aids to success. Mental anxiety, or ill-health, are not conducive
to the desired end. Attention to correct breathing is of importance.