I suppose the most important thing, the heaviest single factor in one's life, is whether one's born male or female. In most societies it determines one's expectations, activities, outlook, ethics, manners - almost everything. Vocabulary. Semiotic usages. Clothing. Even food. Women... women tend to eat less... It's extremely hard to separate the innate differences from the learned ones. Even where women participate equally with men in the society, they still after all do all the childbearing, and so most of the child-rearing.
Ursula K. Le GuinAs a man's real power grows and his knowledge widens, ever the way he can follow grows narrower: until at last he chooses nothing,but does only and wholly what he must do.
Ursula K. Le GuinA profound love between two people involves, after all, the power and chance of doing profound hurt.
Ursula K. Le GuinThe literature of the emperor penguin is as forbidding, as inaccessible, as the frozen heart of Antarctica itself. Its beauties may be unearthly, but they are not for us.
Ursula K. Le Guin