The presence of love kindles into the will a fire of sacred love. Being always with the Holy One, who is a consuming fire, reduces to ashes whatever can be in opposition to it. The soul thus aflame can no longer live except in the Presence, a presence that produces in its heart a holy ardor, a sacred eagerness, and a fierce yearning to see God loved, known, served, and loved by all creatures.
~ from PRACTICING THE PRESENCE by Br. Lawrence (17th c.)
Living beings, upon attaining a threshold level of self-awareness, begin to yearn to reunite with their Source. The weird thing is that these living beings initially seem unaware they are literally made up of the substance of the Source. Thus, they do not seem to understand it is as impossible to fear God as it is to fear oneself. Yet the evolution of living sentient beings is eventually defined in terms of the beings' ability to discover this relationship between the original God Source and their own selves. Once this happens, the dominant theme of existence is love. One can love oneself, and all others, because one sees that all of everything is created from the same fabric ... Love is the theme of God, the glue that keeps the universe together.