From Gilbert K. Chesterton we could learn that reality is not flat but paradoxical. In plain terms, that things are not black or white, not even gray, but black, white... and gray, all at once, in a complex creative dynamic. And he showed us that, to understand the world we live in, we must see the dialectical logic that advances thanks to the combat between contraries. More dangerous than single-mindedness is linear, static, or metaphysical thinking, which flattens everything.