Strange Thing, Love.

The mind is the totality of conscious and unconscious mental processes and activities.
Insanity means a derangement of the mind.
Madness is most commonly known as insanity.
An obsession could be defined as being mad for whatever it is your are obsessing over.
Infatuation is a less severe form of an obsession.
When you feel lust, does it not begin with an infatuation?
And in order to love, we most often lust prior.

So to love, you must lust.
Lust starts with an infatuation.
Infatuations grow into obsessions.
To obsess is madness.
And madness is insanity.

To feel LOVE, you must first be utterly and completely INSANE.