Viktor Frankl, Man's Search For Meaning

From all this we may learn that there are two races of men in this world, but only these two — the “race” of the decent man and the “race” of the indecent man. Both are found everywhere; they penetrate into all groups of society. No group consists entirely of decent or indecent people. In this sense, no group is of “pure race” — and therefore one occasionally found a decent fellow among the camp guards.

Viktor Frankl, from Man’s Search for Meaning.

A book I intend buying as soon as possible.