The Book of Zohar has a double effect.
First, if we want to develop and read it patiently, systematically, under certain conditions, with the intention of developing, then through it, through studying it, a special developing force descends upon us.
Second, to the extent of our development, each time we will feel and understand more of what is written in The Book at the level that we reach.
The Book itself covers all spiritual layers to the very end. You can read it as long as it takes for you to reach your full spiritual elevation.
Question: Do we need it after that?
Answer: After that, you will already know everything, you will understand everything, you can do everything.
It means that you can read The Book of Zohar for a hundred years without any advancement, without receiving anything. Or, you can read it in such a way that within five to ten years it will elevate you to its final degree.
From KabTV’s “The Power of The Book of Zohar” #14