" If our life—indeed the entire universe—does repeat, what do we control? Not our actions, Nietzsche thought, but our attitude. His philosophy was, at its heart, “an experiment in reorienting oneself within a world of total uncertainty.” Typically, we run from uncertainty and toward certainty. But that, says Nietzsche, is not an immutable fact. It is a value, and anything we value we can revalue. "

― Eric Weiner , The Socrates Express: In Search of Life Lessons from Dead Philosophers