Question: What is frivolity when it comes to inner work?
Answer: Frivolity is a very wide notion: It ranges from my stopping my work completely to a state when I change from a more beneficial activity to a less beneficial one, but one that is more pleasant, convenient, and easier.
Frivolity may be manifested in doing things that completely contradict the path, to the extent of minor transgressions or even allowing myself a little “freedom” in thought, analysis, and desires.
Where does the expression “frivolity” come from? A “heavy head” means that a person is constantly judging himself, analyzing, and is full of thoughts. And easiness of mind means that he frees his head of proper activity, and then it becomes filled with different worthless foreign thoughts.
It can even be something that does not contradict the Creator in any way, when a person simply allows his head to be filled with thoughts of this corporeal world.
From the 1st part of the Daily Kabbalah Lesson 2/12/12, Writings of Rabash