“Four proximate effects may be ascribed to love: namely, melting, enjoyment, languor and fervour. The freezing or hardening of the heart is a disposition incompatible with love, while melting denotes a softening of the heart, whereby the heart shows itself to be ready for the entrance of the beloved. If, then, the beloved is present and possessed, pleasure or enjoyment ensues. But if the beloved is absent, two passions arise: namely, sadness at is absence, which is denoted by languor; and an intense desire to possess the beloved, which is signified by fervour… Love is the cause of both pleasure and sorrow.”
Thomas Aquinas, quoted in Christian Mystics by Matthew Fox
Chorlton Unitarians 