When the belief that we are lovable is lost, we lose the will to live and our health deteriorates. Frankl reported that the death rate in the Nazi concentration camp where he was held during WWII increased between Christmas and New Years. He believed that this was due to the disappointment at not being home for the holidays, rather than the harsh weather and increased cold. Some people believe that pure love is the essential energy of all creation, the primal God stuff that all things are made of. It's a basic assumption of physics that everything in the universe and all that exists are functions of the flow of love.
All creation is the expression of love.
The fear of losing love and the forms that fear takes, e.g. hatred, anger, fear, envy, jealousy, etc., represent the stagnation or restriction of the flow of love. Some healing systems view the body as a composite of various bodies created by a continuum of energy that flows from the pure energy state to the slow vibration of the physical body. In this view the physical body is created from essential energy, of God stuff, by the intention of the consciousness that creates it by slowing the vibrational rate until the energy congeals as matter. This consciousness is the soul or essential mind. The choices of the soul form the body from the universal energy pool, like an ice cube being created form the universal body of water that permeates everything on Earth, in the Earth and above the Earth.