With runes, you could practically do almost everything you'd ever want, and oftentimes in more than one way. However, it took time, creativity, knowledge, and experience to get the desired effect. Jon was about to head out when he suddenly froze. A myriad of rushed thoughts and feelings flooded him, despite the rather solid control of his mind and feelings. Longing and bitterness gripped his mind. Jon Snow had been assimilated into his mind and soul, so his desires were still there.