The Fundamental Laws of Magic

You must not be under the misimpression that magic is all-powerful. There are limits, and not even the greatest mages may overcome them.

No one, for instance, has found any means of travelling - either over great distances or small ones - beyond putting one foot in front of the other. The immutable nature of the physical world prevents this. So no, you may not simply pop over to Minrathous to borrow a cup of sugar, nor may you magic the essay you "forgot" in the apprentice dormitory to your desk. You will simply have to be prepared.

Similarly, even when you send your mind into the Fade, your body remains behind. Only once has this barrier been overcome, and reputedly the spell required two-thirds of the lyrium in the Tevinter Imperium as well as the lifeblood of several hundred slaves. The results were utterly disastrous.

Finally, life is finite. A truly great healer may bring someone back from the very precipice of death, when breath and heartbeat have ceased but the spirit still clings to life. Once the spirit has fled the body, it cannot be recalled. That is no failing of your skills or power, it is simple reality.