The danger of motherhood. you relive your early self, through the eyes of your mother.

The innocence of such children doesn't answer our deepest questions about this vale of tears to which we are condemned, but it helps to dispel them. That is the secret to family life.

Was it the act of giving birth that made you a mother? Did you lose that label when you relinquished your child? If people were measured by their deeds, on the one hand, I had a woman who had chosen to give me up; on the other, I had a woman who'd sat up with me at night when I was sick as a child, who'd cried with me over boyfriends, who'd clapped fiercely at my law school graduation. Which acts made you more of a mother?

Both, I realized. Being a parent wasn't just about bearing a child. It was about bearing witness to its life.

I wondered how long it took for a baby to become yours, for familiarity to set in. Maybe as long as it took a new car to lose that scent, or a brand-new house to gather dust. Maybe that was the process more commonly described as bonding: the act of learning your child as well as you know yourself.

Girls mature faster than boys, cost more to raise, and statistics show that the old saw about girls not knowing about money and figures is a myth. Girls start to outspend boys before puberty—and they manage to maintain this lead until death or an ugly credit manager, whichever comes first.

Males are born with a closed fist. Girls are born with the left hand cramped in a position the size of an American Express card. Whenever a girl sees a sign reading, “Sale, Going Out of Business, Liquidation,” saliva begins to form in her mouth, the palms of her hands perspire and the pituitary gland says, “Go, Mama.” In the male, it is quite a different story. He has a gland that follows a muscle from the right arm down to the base of his billfold pocket. It's called “cheap.”

Girls can slam a door louder, beg longer, turn tears on and off like a faucet, and invented the term, “You don't trust me.” So much for “sugar and spice and everything nice” and “snips and snails and puppydog tails.

Babies are soft. Anyone looking at them can see the tender, fragile skin and know it for the rose-leaf softness that invites a finger's touch. But when you live with them and love them, you feel the softness going inward, the round-cheeked flesh wobbly as custard, the boneless splay of the tiny hands. Their joints are melted rubber, and even when you kiss them hard, in the passion of loving their existence, your lips sink down and seem never to find bone. Holding them against you, they melt and mold, as though they might at any moment flow back into your body.

But from the very start, there is that small streak of steel within each child. That thing that says "I am," and forms the core of personality.

In the second year, the bone hardens and the child stands upright, skull wide and solid, a helmet protecting the softness within. And "I am" grows, too. Looking at them, you can almost see it, sturdy as heartwood, glowing through the translucent flesh.

The bones of the face emerge at six, and the soul within is fixed at seven. The process of encapsulation goes on, to reach its peak in the glossy shell of adolescence, when all softness then is hidden under the nacreous layers of the multiple new personalities that teenagers try on to guard themselves.

In the next years, the hardening spreads from the center, as one finds and fixes the facets of the soul, until "I am" is set, delicate and detailed as an insect in amber.