Thanks to the congress, we felt how we distanced ourselves a little from our ten and then drew near it again, like a pendulum swinging back and forth, changing the degree of our connection with each other or our connection with the Creator, our attitude toward the study. We had less strength, became weaker, and then got all the power back.
Each such full period of movement of the pendulum back and forth, rise and fall, does not pass without a trace, but leaves an imprint on us.1
From the Preparation for the Daily Kabbalah Lesson 11/16/19, Hardening of the Heart
1 Minute 9:20