pendulum

That’s the nature of politics, and in a democracy the pendulum swings in reaction to each administration.

This process resembles several pendulums gradually swinging together at the same frequency.

For the most part they are thoughtful and honest journalists intent on restoring high standards and pushing the pendulum back a little toward the plumb-line.

“The pendulum between fear and greed is swinging toward the former,” Bannockburn’s Marc Chandler writes, citing large writedowns at some banks.

Nature follows countless rhythms: the changing of the seasons comes from Earth's orbit around the Sun, and the steady tick of a clock arises from the back-and-forth swing of its pendulum.