I have mentioned the ‘psychopath’ as an example of the gravest sort of sinner, and I suppose I would stand by that, although it was the traitorous, and those who would betray, that Dante, in Inferno, relegated to the ninth circle of Hell, suggesting that, in his view (which in some ways was aggrieved, but which also had an Aristotelian aspect, so as not to be lacking in reason, or logic) it was this type of sin, and this kind of sinner, that was the worst, or most detestable. Judas Iscariot being the foremost example.