Forgive me for not remembering exactly where it is that Marnia said this, but, I remember an article or something in the book where she talks about how the biological self is very petty and cruel. Believe this!
When I read "Peace", I felt that it offered a world of insight into relations between men and women. Some of Marnia's ideas are clearly backed up by science, and others require that I trust her intuition or rely on her personal experience.
I was visiting a young lady yesterday; once I began paying attention, it is self-evident. I understand that in the past, I have always put my selfish biological impulses ahead of everything, and my relationships turned out like ****. In my efforts to make my relationships better, I have spent time reading books about love and sex, most of which emphasize winning strategies for playing biology's mating game: in other words, how to score, not how to love somebody. While I understood the material, I just couldn't see myself eagerly looking forward to going out for 'hunting'. One day, I came across "Peace". With its overall message of opening up your heart and *loving* someone, as opposed to just thinking about what should I do to score with her, "Peace" is a breath of fresh air; a light in the dark wilderness. I feel like I've finally come across some information that I can put to use to make my world a better place.
Anyhow, I was visiting a young lady. I was keeping in mind to show her love; to not worry about giving in to my biological impulses, because I know that once I "use" her, she will be "used up" almost instantatenously and I will be moving on. Consciously thinking about this, my mind kept coming up with all matter of excuses of why she didn't deserve my love and affection. Then, my biological self let me have it with fear and self-loathing: it told me that I won't be happy with her; it told me that it's silly to try to *love* someone; it told me that it's time to eat the cookies and move on. The toughest part was when I kissed her and my biological self wanted me to let go and "feel her up". I was very mindful that every time I touched her, I was doing it for her, not for me.
To make an analogy, think of the story of Buddha's enlightenment under the Bodhi tree. The story is that he sat under a Bodhi tree for years having sworn that he would not get up until he became enlightened. As he came close to becoming enlightened, Mara ( a malevolent Hindu deity ) unleashed upon him all matter of demons and monsters to distract him from his noble effort. We can think of the cruel, petty biological self as being like Mara and the primitive impulses as being like demons and monsters here.