Oren tells Marcus: You have a peaceful, noble heart. But as we discussed last night, some men deserve to die. Valeria knows that.

Few men are a threat to a fully-trained wizard.
Oren the Wise

No man, no power, can bind the action of wizardry or still the words of power. For they are the very words of Making, and one who could silence them could unmake the world.

Unseen University was much bigger on the inside. Thousands of years as the leading establishment of practical magic in a world where dimensions were largely a matter of chance in any case had left it bulging in places where it shouldn't have places. There were rooms containing rooms which, if you entered them, turned out to contain the room you'd started with, which can be a problem if you are in a conga line.

Nobody gets in to see the wizard. Not nobody.

But 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 must follow knowledge, and serve need.