By controlling our perceptions, the Stoics tell us, we can find mental clarity. In directing our actions properly and justly, we’ll be effective. In utilizing and aligning our will, we will find the wisdom and perspective to deal with anything the world puts before us.

But in all circumstances—adversity or advantage—we really have just one thing we need to do: focus on what is in our control as opposed to what is not. Right now we might be laid low with struggles, whereas just a few years ago we might have lived high on the hog, and in just a few days we might be doing so well that success is actually a burden. O