Remedial Measures
The most important general remedy for over-prolonged mental occupation
with a single subject, is some outdoor sport or form of exercise that
requires all the attention. Horseback exercise is particularly
valuable; boating, especially where the man has charge of the boat
himself and where he has to have his wits about him, and the various
sports. It is particularly important that men should not be alone
during the taking of their exercise and diversion of mind. Above all,
human interests take a man outside of himself and keep him from
disturbing his mental equipoise by too much devotion to a single
subject.