“Emotions are not just the fuel that powers the psychological mechanism of a reasoning creature, they are parts, highly complex and messy parts, of this creature’s reasoning itself,”philosopher Martha Nussbaum wrote in her incisive treatise on the intelligence of emotions, titled after Proust’s powerful poetic image depicting the emotions as “geologic upheavals of thought.”

But much of the messiness of our emotions comes from the inverse: Our thoughts, in a sense, are geologic upheavals of feeling — an immensity of our reasoning is devoted to making sense of, or rationalizing, the emotional patters that underpin our intuitive responses to the world and therefore shape our very reality. Our interior lives unfold across landscapes that seem to belong to an alien world whose terrain is as difficult to map as it is to navigate — a world against which the young Dostoyevsky roiled in a frustrated letter on reason and emotion, and one which Antoine de Saint-Exupéry embraced so lyrically in one of the most memorable lines from The Little Prince: “It is such a secret place, the land of tears.”

From Maria Popov