Keep an open heart. We are wired to find love.

The reason you take antidepressants is to feel calm. And romantic love is not calm -it's elation, it's mood swings, and you're killing all that when you take the drug.

Men and women are like two feet; they can help each other get ahead.

Women's worst invention was the plow. With the beginning of plow agriculture, men's roles became extremely powerful. Women lost their ancient jobs as collectors.

There is more and more data indicating that there is a biological basis to your political views.

People have often asked me whether what I know about love has spoiled it for me. And I just simply say, 'Hardly.' You can know every single ingredient in a piece of chocolate cake, and then when you sit down and eat that cake, you can still feel that joy.

Until recently, we regarded love as supernatural. We were willing to study the brain chemistry of fear and depression and anger but not love.