Moiraine: Words are important and how we use them is important.
Egwene: I don't know.
Moiraine: One, to speak no word that is not true. Two, to make no weapon with which one person may kill another. Three, never to use the one power as a weapon; except in the last extreme defense of her life, or the life of her warder, or another Aes Sedai. These oaths are bound by the one power itself, it's not that we do not break them, its that we can not break them.