Few prayers are as well known to Jews as Ashamnu (“We have sinned ...”) and Al Chet (“For the sin ...”), the twin confessions of Yom Kippur. Belief in human sinfulness is more central to Judaism than we think. Sin may not be “original,” as it is in Christianity — inherited from Adam, that is, as a sort of genetic endowment ever after. But it is at least primal: It is there, patent, indelible and unavoidable. We may not be utterly depraved — the teaching with which American Protestantism grew up — but we are indeed sinners.