He went back to them at once.
"My dear Bosio," he began again, "do not put yourself down as the worst of men.

It is just as bad to go too far in one direction as in the other.

There is undoubtedly, in theory, the man in the world, at any given moment, who must be a little worse than any other living man; but though he might be our next-door neighbour, we have no means whatever of knowing that he is the greatest sinner alive, because we do not know all about all existing sinners.

Consequently, and for the same reason, no man has any right to assume that he is worst of men.

And as far as that goes, many men have done worse things, even in the religious view, than you have done, and very much worse things, in the opinion of society.
You are not responsible for all that the others have done.