Thought of the normal type is impossible unless the various parts of the brain are perfectly coordinated, just as the slightest accident to a telephone wire may leave a subscriber cut off from the rest of the world, but thoughts, feelings, emotions, cravings, originate elsewhere, in the autonomic nervous system.
Nerve Memory. In our autonomic nervous system all our life impressions are indelibly recorded, probably thru infinitesimal chemical modifications of the nerves and the resultant tensions. Pleasant nerve impressions (pleasant memories) direct us toward certain objects which are the source of such impressions, unpleasant impressions drive us away from the outside stimuli which once produced them.
The former cause our heart to beat slowly, peacefully, powerfully, the latter speed up the cardiac pump so as to send energy as fast as possible wherever it is needed for defence against harm.
Pleasure, indifference and pain, built upon billions of nerve memories, make up the woof of our thinking. They ARE our mind, the mind that falls in love or falls out of love.
The head supplies the energy and the heart registers the rate at which energy is sent thru the body, but the memories of which our thinking is made are stored up elsewhere.
In a scientific study of love, therefore, I shall leave the head and the heart as individual organs out of consideration.