Christian speech of love usually ignores its ambivalence: Instead, love is either praised as a divine gift, or condemned due to its abnormality. This book describes love as a pre-moral bond between people, which urges them to search for ethical orientation. The theological character of love firstly consists in experiencing love like a revelation and secondly in the perpetual bond of partnership, which even outlasts separation. From this ambivalence of love its ethical challenge arises. Thus, the theological character of love constitutes its ethical obligations. In this way, several kinds and states of love, friendship and sexual relationships can be ethically evaluated. This book discusses alternative interpretations of love in theology and human science.