Qual é o significado de uma mão segura?

Ainda não foi explicado diretamente nos livros, mas Sanderson disse que mais serão revelados sobre as razões por trás disso.

No mundo do Arquivo Stormlight, de acordo com a tradição cultural Vorin, é obsceno para uma mulher deixar sua mão segura (sua mão esquerda) descoberta.

Em uma entrevista, Brandon Sanderson afirmou que a tradição deriva em parte de

a famous book written by an artist who claimed that true feminine pursuits and arts were those that could be performed with one hand, while masculine arts were those performed with two hands, in a way associating delicacy with women and brute force with men.

Esta é a citação completa do questionário Q & A:

JON

My burning question for Brandon is did I miss the explanation, world building moment or historical gem that explains why women have a safe hand and why they must keep it covered?

BRANDON SANDERSON (GOODREADS)

No, you haven't missed it. People have asked about this. There will be more explanation in-world as it comes along, but it's for much the same reason that in some cultures in our world you don't show people the bottoms of your feet, and in other cultures showing the top of your head is offensive. It's part of what has grown out of the Vorin culture, and there are reasons for it. One of them has to do with a famous book written by an artist who claimed that true feminine pursuits and arts were those that could be performed with one hand, while masculine arts were those performed with two hands, in a way associating delicacy with women and brute force with men. Some people in Roshar disagree with this idea, but the custom has grown out of that foundational work on masculine and feminine arts. That's where that came from. One aspect of this is that women began to paint one-handed and do things one-handed in upper, higher society. You'll notice that the lower classes don't pay a lot of attention to it—they'll just wear a glove.

As a student of human nature and of anthropology, it fascinates me how some cultures create one thing as being taboo whereas in another culture, the same thing can be very much not taboo. It's just what we do as people.

There's more to it than that, but that will stand for now.

Brandon Sanderson acaba de lançar uma das principais razões por trás da tradição de cobrir as mãos seguras.

One of the primary factors is that when the Recreance happened, Shardblades became available to the people who had not said the oaths and there was a power struggle over them. Over a short period of time, feminine arts were popularized as one-handed, and wielding a weapons was popularized as unfeminine. So establishing that tradition was partially a power grab from the men - because when you have plate and blade, it doesn't really matter what gender you are. You're on equal ground.
_Twitter

O link no tweet vai na sua página de FAQ aqui , que é quase o mesmo que a citação na resposta de Tim.