+ Even when it seems that we do multiple tasks in parallel, we do only one task at each moment. We switch the target task rapidly. The switching cost is not zero. Executing multiple tasks in parallel has an additional task: the decision of task switching. The cost of switching is low for experts, high for novices. If you are trying to do more than one task and you are not motivated, let's focus on one thing first and finish them one by one.
In this case, we start from the daily choices. By observing daily decisions, we eventually find some common patterns from them. It is the information gathering and the pattern discovery we learn in Chapter 1. Through this abstraction, we finally get our goal of life as our own words.
- ある著者の本Xを読むかどうか決める前に、まず歴史の文脈の中でのその本Xの位置付けを知ることができます。たとえば哲学者Immanuel Kant（カント）の『純粋理性批判』は、数学者Gottfried Wilhelm Leibniz（ライプニッツ）などが、神が正しいことを前提として理性の正しさを論じたことに対し批判的な立場を取った西洋哲学史の重大な転換点となる書籍です。そこから100年ほど経って、哲学者Friedrich Wilhelm Nietzsche（ニーチェ）が『悦ばしき知識』で「神は死んだ」と言うきっかけになった......という話はまったく本の中身を読まなくても知ることができます。これが「ぜんぜん読んだことのない本」です 注10。
Before deciding whether to read a book X, you can know the position of the book X in the context of history. For example, Philosopher Immanuel Kant wrote "Critique of Pure Reason."
Before the book, a mathematician Gottfried Wilhelm Leibniz argued the correctness of reason on the assumption that God is right. Kant took a critical position against the opinion.
The book is a turning point of the history of the philosophy.
A hundred years later, the philosopher Friedrich Wilhelm Nietzsche said "God is dead" in his book "Amazing Knowledge." Kant triggered Nietzsche to say that.
Even if you do not read these two books, you can know this information. This is the class "A book that you have never read."
+ However, because I defined "to review" as "make it shorter or longer," the review process becomes painful. I made a "to review" list in the service. If a note has nothing to remove or add, it remains in the list. The pile of tasks harms motivation.