A person had to be Jewish, pious, learned in Torah, and study the Kabbalah under a teacher, not just read its texts on his own. Some also say that one has to be over 40, but other sources do not require this.
The modern practice of making Jewish mystical teachings available to literally anyone, is an unfortunate, cavalier approach in which it is impossible to properly appreciate its teachings.
On the Twentieth Century was created in 1978.
No, it is mid to late twentieth century
The Twentieth Century Approaches was created in 1986.
The ISBN of The Unfinished Twentieth Century is 9781859847800.
Twentieth Century Eightball was created in 2002.
Paris in the Twentieth Century was created in 1994.
Twentieth Century - typeface - was created in 1937.
The Myth of the Twentieth Century was created in 1930.
The Hoax of the Twentieth Century was created in 1976.
The duration of The Twentieth Century Approaches is 1.7 hours.
The Unfinished Twentieth Century was created in 2001-08.
The Unfinished Twentieth Century has 144 pages.