I do not say, nor do I imply, that one must be robust. Many a
person delicate by natural inheritance has spent a long Ufe of great
usefulness by attention to the second point, which is, you must know
the laws of aeallh. I refer to hygiene, physiology, physical education.
In addition to the advantages year by year both as to quantity and
quality of the work, mentioned before, it will add a score of years to
your work at the time of life when, by your experience and influence,
you are qualified to do your best work. A year of usefulness after
twenty-five years of experience is worth several times as much as the
first year when you have had no experience. Attention to this second
point adds the years at the valuable end of your life. " My son forget
not my law : but let thine heart keep my commandments ; for length
of days and long life and peace shall they add to thee." This com-
mand and promise is literal, and not figurative. You cannot ignore
God's laws about the body all your life and then be spared the punish-
ment. It may, however, be visited most heavily on your children, if
you are blessed with them, as exhausted physiques and that lack of
reserve power of body which is usually seen in the childi-en of the
overworked.
