It is indeed a pleasure to find in authors conclusions that we have reached previously and on our own. But nothing compares to finding them contrary to ours when, if they do not refute us completely, they prove to be equally reasonable. In the first case, we only rejoice out of vanity; in the second, we actually grow. It must be admitted, however, that this is a rare pleasure, hardly innate, and more often the result of a continuous effort, of an education of the mind to accept contradictions and understand reality as ambiguous and multifaceted—something that very few spirits are willing to do.