ty that no weak spots exist; diet, especially too much eating,
too fast eating; stimulants, tobacco, open-air exercise; cool-headed,
almost callous, critical analysis of oneself, one's sensations and
effect of work on the system; clear knowledge of danger lines; result,
avoidance of transgressing, and immediate summons at right time."

These men are men of self-restraint. They are like rivers having dams,
keeping their waters back in order that the water may be used more
effectively. They are free from entangling alliances. They are not men
of one thing; they are often men of two, three, a dozen things. But
one thing is primary, the others secondary. They may have avocations;
but they have only one vocation. "This one thing I do." I have already
quoted from Pasteur. Of him it is said by his biographer: "In the
evening, after dinner, he usually perambulated the hall and corridor
of his rooms at the Ecole Normale, cogitating over various details of
his work. At ten o'clock he went to bed, and at eight the next
morning, whether he had had a good night or a bad one, he resumed his
work in the laboratory." His wife wrote to their children: "Your
father is absorbed in his thoughts, talks little, sleeps little, rises
at dawn, and in one word, continues the life I began with him this day
thirty-five years ago." Learn from the Frenchman, my boy!

Keeping themselves at their one work these men embody a sense of duty.
I find they have a conscience. Their conscience is not worn outside,
but inside, their bosom. They make no show of doing what they ought.
They simply do what they are called upon to do--and that is all there
is to it. It was said of a first scholar in an historic college that
he was never caught working. These same men may, or may not be caught
working, but they do work, and their work is a normal and moral part
of their being.

But your face, my son, is rather toward your own future than toward
the past of other men. But your own future is as nothing save as it
touches other men. Therefore, do have an enthusiasm for man as man.
Enthusiasm for humanity has its basis in love for man as man, in a
belief in the indefinite progress of man and in a determination to
promote that progress. In a posthumous romance of Hawthorne the
heroine points out to her lover the service which they will give to
mankind in successive endless generations. In one age, poverty shall
be wiped out; in another, passion and hatred and jealousy