Rats can laugh, but the dogs aren’t smiling: they’re hooked on oxytocin, which rises when we lock eyes with one another. Oxytocin is not dissimilar to OxyContin, an opioid analgesic which can result in a similar sense of euphoria or attachment.
to practice intense study. to research. to seek again. to require confirmation, a proof. to believe. to believe in knowing because it can be said again and again. the proving of a theorem. now the corollary: to have learned