During this time of reflection I was far from idle. We were going ahead
with a four-cylinder motor and the building of a pair of big racing
cars. I had plenty of time, for I never left my business. I do not
believe a man can ever leave his business. He ought to think of it by
day and dream of it by night. It is nice to plan to do one's work in
office hours, to take up the work in the morning, to drop it in the
evening--and not have a care until the next morning. It is perfectly
possible to do that if one is so constituted as to be willing through
all of his life to accept direction, to be an employee, possibly a
responsible employee, but not a director or manager of anything. A
manual labourer must have a limit on his hours, otherwise he will wear
himself out. If he intends to remain always a manual labourer, then he
should forget about his work when the whistle blows, but if he intends
to go forward and do anything, the whistle is only a signal to start
thinking over the day's work in order to discover how it might be done
better.

The man who has the largest capacity for work and thought is the man who
is bound to succeed. I cannot pretend to say, because I do not know,
whether the man who works always, who never leaves his business, who is
absolutely intent upon getting ahead, and who therefore does get
ahead--is happier than the man who keeps office hours, both for his
brain and his hands. It is not necessary for any one to decide the
question. A ten-horsepower engine will not pull as much as a twenty. The
man who keeps brain office hours limits his horsepower. If he is
satisfied to pull only the load that he has, well and good, that is his
affair--but he must not complain if another who has increased his
horsepower pulls more than he does. Leisure and work bring different
results. If a man wants leisure and gets it--then he has no cause to
complain. But he cannot have both leisure and the results of work.