Sorcery

Cernunnos, the Horned God (by hungerartist)

"The Horned Lord once said that sorcery is a sword without a hilt. There is no safe way to grasp it."

~Dalla (A Storm of Swords)

In the context of the story, she meant that even if you have a powerful and magical object at your disposition, using it might turn out to be to your disadvantage as well.

This reminds me of the Iroquois Law that states "In our every deliberation, we must consider the impact of our decisions on the next seven generations."

AKA think before you act, and think real hard and beyond just the immediate future.

PS: Oviously, the Horned God and the Horned Lord are not the same, but the former is much more impressive, don't you think?