The children of God cannot glorify Him with sickly bodies or dwarfed minds. Those who indulge in any species of intemperance, either in eating or drinking, waste their physical energies and weaken moral power.
- (1890) Christian Temperance and Bible Hygiene p.53
A merry heart doeth good like a medicine: but a broken spirit drieth the bones. (Proverbs 17:22)
"Sickness of the mind prevails everywhere. Nine tenths of the diseases from which men suffer have their foundation here...."
How?
Many of the diseases from which men suffer are the result of mental depression. Grief, anxiety, discontent, remorse, guilt, distrust, all tend to break down the life forces and to invite decay and death. - ML 151.2