Szeth- Light Leaks

Holding his breath, he clung to the Stormlight. He could still feel it leaking out. Stormlight could be held for only a short time, a few minutes at most. It leaked away, the human body too porous a container. He had heard that the Voidbringers could hold it in perfectly. But, then, did they even exist? His punishment declared that they didn’t. His honor demanded that they did.

Way of Kings Prolouge