We often dismiss theory on the basis that it’s not as useful as practice. We often believe that “practical” books—how-to books—are inherently better. I think that is because we live in the era of personal development. But let’s not dismiss theory because we need theory to get to the practical stuff. We need to lay out theories about the world because we don’t have all the answers just yet. We need to form theories because they guide us through our investigations of the world. We need theory as much as practice, so let’s not dismiss it.