“Bringing people into existence as well as failing to bring people into existence can be regretted. However, only bringing people into existence can be regretted for the sake of the person whose existence was contingent on our decision. This is not because those who are not brought into existence are indeterminate. Instead it is because they never exist. We can regret, for the sake of an indeterminate but existent person that a benefit was not bestowed on him or her, but we cannot regret, for the sake of somebody who never exists and thus cannot thereby be deprived, a good that this never existent person never experiences. One might grieve about not having had children, but not because the children that one could have had have been deprived of existence. Remorse about not having children is remorse for ourselves—sorrow about having missed childbearing and child-rearing experiences. However, we do regret having brought into existence a child with an unhappy life, and we regret it for the child’s sake, even if also for our own sakes. The reason why we do not lament our failure to bring somebody into existence is because absent pleasures are not bad.”

“We do not exist for the sake of something else. We exist for the sake of ourselves.”

“Creating new people, by having babies, is so much a part of human life that it is rarely thought even to require a justification. Indeed, most people do not even think about whether they should or should not make a baby. They just make one. In other words, procreation is usually the consequence of sex rather than the result of a decision to bring people into existence. Those who do indeed decide to have a child might do so for any number of reasons, but among these reasons cannot be the interests of the potential child. One can never have a child for that child’s sake.”

“On Earth, we are unmanned by our longing for a pastoral past that never really existed; and that, if it had existed, could never exist again...on the Moon, there is no past to long for or dream about. There is no direction but forward.”

“To be a child means to owe one's existence to another, and even in our adult life we never quite reach the point where we no longer have to give thanks for being the person we are.”

“Imagination was so powerful that you had to be careful because you could imagine things into existence that you might regret.”