For example, people of certain religious persuasions love ideas that encourage them to deny themselves in the service of their faiths. Under certain circumstances, they may sacrifice their lives to protect their religious ideals. On the other hand, many are in love with the nation in which they dwell. This is called nationalism. Under specific conditions, they sacrifice themselves or others for their love of the nation.
Love is a fantasy .
These serve to establish the cultural climate of love. When two people are in love they share a fantasy that requires nurturing. This fantasy radiates from within them. It is a shared private myth. Either one can destroy this fantasy, and the relationship will fall apart.