Abstract

Human beings have physical and psychological limits, but also ethical, which are precisely what make their actions human. These ethical limits enable any debate and investigation, in particular, with human beings. Therefore, any investigation would be unfeasi- ble without those limits. We talk about ethical limits, not in the sense of impediment but in the sense of possibility for action; you can only speak of ethical limits if you af rm a truth that is valid for everyone and for all times, regardless of oneself. We are witnessing a true progress as long as a research is carried out for the bene t of human beings. That’s right; you can only speak of progress if it is understood in a growth in humanity.