The philosophy of Levinas poses a challenge to anthropology. For Levinas, the 'secrecy of subjectivity', the absolute incomprehensibility of one individual to another, is the fundamental fact of human being. It is also the foundation of morality, and ethical system, acknowledging the irreducible mystery and integrity of '… [the people] who did not have the frail courage to look into our eyes, throw us a piece of bread, whisper a human word. I remember very well that time and that climate (…). Almost all, but not all, had been deaf, blind and dumb (…). I do not understand, I cannot tolerate the fact that a human being should be assessed not for what he is but because of the group with which he happens to be associated'.