(Continuation from yesterday)
It might be true that Ninomiya Sontoku was both reading and studying to save time, but it was not a main reason.
I think he knew the following very well.
(1)Being able to concentrate reading
During walking, I cannot access another information except for reading.
I can attain a state of perfect self-effacement walking at a uniform pace.
(2)Efficient performance
Needless to say, he could do three things at the same time, (a)reading books, (b)carrying firewoods, (c)building a strong body, keep his good health. These activities might have given him his rich life within limited life time.
(3)Pleasure
I can enjoy seasonable view and climate, and "smell of the air " gives me joy, in particular.
Not only plum and cheery cherry, but tender green, snow, sunshine in hot day, frigid climate in cold might. Everyday, every time, when I stop walking to notice changes of the smells, I feel happy very much.
(So, I am pretty spoiled at the day when a smoker walks ahead of me less than 500 meters.)
(To be continued)