Answer: The mind is not trying to knock us off this point, but to awaken the sense of imbalance, like in an equilibrist balancing on a rope.
Our entire life is meant to give us a sense of imbalance, pushing us to look for a higher point of balance and thus to rise.
This point of balance is constantly renewed, not in its quantity, but in quality. We need to feel this ourselves.
From a Kabbalah Lesson in Russian 12/16/18