> Finally all good books should be read twice or more. Good reading is rereading.

Fully agreed!

> This is a hard rule to follow because nobody has time to read the same book twice

Disagreed. I read fiction and I tend to re-read a lot, sometimes three or four times. I read for pleasure, so I have the time. Reading is "me" time, and I spend it however I want.

It's only hard to re-read if you have some silly goal like "I must read N books this month". I find such goals worthless.