Why this book started with three “不亦”？
“学而时习之”——What is "学"？Who need to "学"？ If “学”=learn and then learn what? After learn this book what we can get or we will become who?
First , this sentence misses a subject. "Who"to learn. “君子”（near word is "gentleman" but not exactly).And this book try to change a "gentleman君子”to a "sage 君". In this point we can translate 《论语》to <The way that from gentleman to sage> haha 😆. So if you don't want to become a sage you don't need to read this book.
阅读是不能脱离读者的，而不能承当这个阅读的读者是没有阅读的，只不过是看一些文字而已。（I can't translate this sentence,who can try it. )
To be continued.
All of above is from 缠中说禅。