If we mammals don't get something to eat every day or two, our temperature drops, all our signs fall off, and we begin to starve. Living at biological red alert, it's not surprising how obsessed we are with food; I'm just amazed we don't pace and fret about it all the time.

Ecstasy is what everyone craves - not love or sex, but a hot-blooded, soaring intensity, in which being alive is a joy and a thrill. That enravishment doesn't give meaning to life, and yet without it life seems meaningless.

Love is the great intangible. ... Frantic and serene, vigilant and calm, wrung-out and fortified, explosive and sedate -- love commands a vast army of moods. Hoping for victory, limping from the latest skirmish, lovers enter the arena once again. ... Love is the white light of emotion. ... Everyone admits that love is wonderful and necessary, yet no one can agree on what it is.

habit, a particularly insidious thug who chokes passion and smothers love. Habit puts us on autopilot.

It's essential to tailor rehab to what impassions someone. The brain gradually learns by riveting its attention-through endless repetitions.

The visual image is a kind of tripwire for the emotions.

It's so acceptably easy for a woman not to strive too hard, not to be too adventure-crazed, not to take too many risks, not to enjoy sex with full candor ... It isn't seemly for a woman to have that much zest.