In a Nutshell
Separation and joining are inherent to competitive societies. We must specialize (or differentiate) in order to deliver worth in the service of others, but must also unite to satisfy the physical and psychological needs that our investment in specialization makes inaccessible to us.
Separation and joining appear as a dichotomy in several spiritual traditions. Among these are the Chinese principles of Yin and Yang, and the masculine (aggressive individuality) and feminine (sociability) characterizations of personality. In this discussion, we adopt the dichotomy of power and love.
While the expression of our unique skills provides us power, without power we cannot execute our skills. Since our skills differentiate us from others, by implication we need power to separate ourselves from others. When individuals compose themselves as a society, their combined power enables expressions of choice that give rise to cultural resilience and advancement.
Love, at an emotional level, is the urge to join with others. Practically, its effect is to create power in our chosen associates. Identification of ourselves with others supports cultural cohesion and the raising of children.
Self-love, conversely, can give rise to a clarity of purpose and directness of vision that liberates substantial energy towards the accomplishment of our life goals.
There is a tension between power and love. Love requires sublimation of our individuality in the service of others. Power, in a social species such as homo sapiens, forces others to hew to our agenda, sacrificing their individuality and - if improperly managed - fostering resistance to the accomplishment of our goals.
I have come to apprehend that these dichotomies are woven into the fabric of reality. The physical principles governing the construction of reality may imply that the world we perceive exists for the purposes of fostering the development of beings that manifest an ideal balance of these principles: The universe seeks to create entities that are optimally configured for the management of energy. For people, that endpoint is a mature adulthood. Surprisingly, achieving that state may open the door for our conscious participation in the construction of reality in higher dimensions.
In short: the Universe doesn't love us, but invests in our capacity to grow up. Ultimately, the Universe encourages those that accept this imperative to practice love, and rewards us for our success.