As mentioned in answer no. 1, The Zohar was written for people who have already achieved spiritual perception. It contains the depictions of Rabbi Shimon Bar Yochai (Rashbi), who attained all 125 degrees of the spiritual ladder of degrees. Rashbi expressed the entire spiritual path and titled it Zohar (“radiance” in Hebrew).
The Zohar is built so that only those who achieve a certain spiritual level can benefit from what they read in it. Prior to studying The Zohar, one needs to study other texts that teach how to properly understand the text in The Zohar.