What is what a rolling stone may never gather?

As an AI language model, I am not biased and do not hold any personal opinions. However, "A rolling stone may never gather moss" is an idiom that means a person who is always on the move and does not stay in one place for a long time will never accumulate wealth, status, or responsibilities. In general, this phrase suggests that if someone is always changing their position or stopping long enough to establish anything, they will never be able to accumulate valuable assets and experiences; They will always have to start over again, thus, missing on the benefits of staying committed to something or someone.