Those who suffer from an exaggerated sense of their own ability and accomplishment are continually subject to frustration, disappointment, and rage when reality intrudes and the world doesn't validate their idealized view of themselves.
I feel they should be discussed informally, truthfully, honestly, and in some cases, I think, without forgetting ... long-term vision. They should be practical.
Buddha himself taught different teachings to different people under different circumstances. For some people, there are beliefs based on a Creator. For others, no Creator. The only "definitive truth" for Buddhism is the absolute negation of any one truth as the Definitive Truth.
The rationale for loving others is the recognition of the simple fact that every living being has the same right to and the same desire for happiness, and not suffering, and the consideration that you as one individual are one life unit as compared with the mulititude of others in their ceaseless quest for happiness.
I feel that the essence of spiritual practice is your attitude toward others. When you have a pure, sincere motivation, then you have right attitude toward others based on kindness, compassion, love and respect.