Oh, love is very much a physical thing.... I realize that it's very complicated, and I'm sure it can't be traced to individual neurons and hormones, but I think it's very much a physiological sensation that takes place in the brain.
Those who are truly enlightened, those whose souls are illuminated by love, have been able to overcome all of the inhibitions and preconceptions of their era. They have been able to sing, to laugh, and to pray out loud; they have danced and shared what Saint Paul called 'the madness of saintliness'. They have been joyful - because those who love conquer the world and have no fear of loss. True love is an act of total surrender.
The mind which is created quick to love, is responsive to everything that is pleasing, soon as by pleasure it is awakened into activity. Your apprehensive faculty draws an impression from a real object, and unfolds it within you, so that it makes the mind turn thereto. And if, being turned, it inclines towards it, that inclination is love; that is nature, which through pleasure is bound anew within you.