"Well - I knew that this would be my thinking, if it came to it. I knew that if I had the choice of healing Father or letting him die - healing you or letting you die - or Sigyn, though I didn't know him then - I knew that given this choice I'd rather heal. The Tesseract didn't teach me entire spells. It taught me enough to build them. But I knew that if I needed healing, I'd want to have it - so I built it."