From a Darwinian perspective, it is clear what pain is doing. It's a warning: 'Don't do that again.' If you burn yourself, you're never going to pick up a live coal again.Richard Dawkins
The healthy man does not torture others - generally it is the tortured who turn into torturers.Carl Jung
A psychoneurosis must be understood, ultimately, as the suffering of a soul which has not discovered its meaning.Carl Jung
One likes people much better when they're battered down by a prodigious siege of misfortune than when they triumph.Virginia Woolf