What sane person could live in this world and not be crazy? - Ursula K. Le Guin

Even the best weapon is an unhappy tool, hateful to living things. So the follower of the Way stays away from it. Weapons are unhappy tools, not chosen by thoughtful people, to be used only when there is no choice, and with a calm, still mind, without enjoyment. To enjoy using weapons is to enjoy killing people, and to enjoy killing people is to lose your share in the common good. It is right that the murder of many people be mourned and lamented. It is right that a victor in war be received with funeral ceremonies.

The trouble is that we have a bad habit, encouraged by pedants and sophisticates, of considering happiness as something rather stupid. Only pain is intellectual, only evil interesting. This is the treason of the artist; a refusal to admit the banality of evil and the terrible boredom of pain.

You must not change one thing, one pebble, one grain of sand, until you know what good and evil will follow on that act. The world is in balance, in Equilibrium. A wizard's power of Changing and Summoning can shake the balance of the world. It is dangerous, that power. It is most perilous. It must follow knowledge, and serve need. To light a candle is to cast a shadow.