LEV576 The prohibited hate is the kind which is "in the heart" [this verse]. Hate can find an outlet in violent reactions, or it can remain quiescent in the heart. A prohibition of overt acts is feasible. However, what is the practical effect of a divine prohibition of an emotion? How can one control his heart to exclude from it an instinctive reaction of hate? Hate is part of man's psyche and will not disappear because it is outlawed. The rabbinical answer to these questions amended the scope of the prohibition of hate. In the opinion of the rabbis, the phrase "in my heart" changes the framework of the prohibition. In effect, the principal aim of the verse is to warn against keeping a grudge bottled up "in the heart," i.e., one must not keep his grudge secret. "Thou shalt surely rebuke thy neighbor." A discussion of one's grievance is therapeutic and desirable. The rabbis regarded as particularly reprehensible any pretense of "business as usual," and needless to say an appearance of friendship, at a time when one bears a grudge in his heart (Bereshit Rabbah 84). The new interpretation stresses the need for purging one's hate rather than prohibiting the initial experience of hate.