Question: Why does time seem to go by very slowly for a person who engages in something that he doesn’t like, but if engages in something that he enjoys, time seems to fly by? What is time for a Kabbalist?
Answer: Time for a Kabbalist is the number of changes that he undergoes at any given moment, and so if he undergoes several states in a second, this second is felt like a number of seconds, and if he is in the same state for an hour, the hour is felt like a second.
That is, time is tensile, capable of being drawn out and stretched. It depends on how we fill it, on the number of states we undergo in any unit time.
From the Kabbalah Lesson in Russian 4/17/16