In Neurosis and Human Growth, Karen Horney explains how pride generates self-hate.
"Briefly, when an individual shifts his center of gravity to his idealized self, he not only exalts himself but also is bound to look at his actual self -- all that he is at a given time, body, mind, healthy and neurotic -- from a wrong perspective. The glorified self becomes not only a phantom to be pursued; it also becomes a measuring rod with which to measure his actual being. And this actual being is such an embarrassing sight when viewed from the perspective of a godlike perfection that he cannot but despise it." (Horney, 1950, pp. 110-11).
Exploring self-hate can be part of the path to becoming spiritual.