IMO, when you fully and completely accept that everything on earth is temporary, this realization gives you a great sense of freedom.
As far as seeking the “inner truth,” of being, it’s true that Stanislavski’s approach is very revealing. . .
“Stanislavski’s system is a method that actors use to produce realistic characters on stage. His original studies of techniques led to the use of emotional memory that required actors to trigger the emotions of their characters internally. This technique was based from a French psychologist Theodule Ribot’s concept of ‘Affective Memory’. Later in his life, Stanislavski realized that a shift in technique was needed for actors to produce more realistic emotions before audiences but he never discredited the use of emotional memory if used cautiously. This was underscored when his talented protégé Michael Chekhov experimented with emotional memory and had a nervous breakdown. A few months before his death he told his assistants that the path to glory can be found by working from the internal (the inside out) as well as the external (the outside in). This led to the ‘Method of Physical Action’.”