Bluntly: "Because I don't trust you, Moiraine. Have I not made that clear? Because I do not know how to make it clearer without repeating myself again. You are a cultivator who stands against 'the Shadow' -- " Here, bitterness taints his words. " -- and I have no reason to believe you will not take whatever tools I give you and turn them against me if I become troublesome. So no. I will not tell you how to practice my necromancy. I will not give you more than you need to take care of this problem. Is that clear enough now?"