Quotation by Arthur Schopenhauer

Hatred is a thing of the heart, contempt a thing of the head. Hatred and contempt are decidedly antagonistic towards one another and mutually exclusive. A great deal of hatred, indeed, has no other source than a compelled respect for the superior qualities of some other person; conversely, if you were to consider hating every miserable wretch you met you would have your work cut out: it is much easier to despise them one and all. True, genuine contempt, which is the obverse of true, genuine pride, stays hidden away in secret and lets no one suspect its existence: for if you let a person you despise notice the fact, you thereby reveal a certain respect for him, inasmuch as you want him to know how low you rate him—which betrays not contempt but hatred, which excludes contempt and only affects it. Genuine contempt, on the other hand, is the unsullied conviction of the worthlessness of another.