Kitap 1
3
It is, however, in the human species that this complexity is most marked; since the co-operation between woman and man aims not merely at existence, but at a happy existence. Nor do mankind beget children merely to pay the service they owe to Nature, but also that they may themselves receive a benefit; for the toil they undergo while they are strong and their offspring is still weak is repaid by that offspring when it in turn is grown strong and the parents by reason of age are weak.
