These are they who spoil their own nervous systems as they spoil their children, when they have them, by yielding to the least desire and teaching them to dwell on little pains.

For such people there is no help but to insist on self-control and on daily use of the limbs.

They must be told to exert themselves, and made to do so if that can be.

If they are young, this is easy enough.

If they have grown to middle life, and created habits of self-indulgence, the struggle is often useless.