So I was thinking about the fact that Renarin, we know, is a Truthwatcher and so has the two surges of Illumination and Progression. From the interludes, we know that Lift can use the food she eats to surgebind and heal herself but if she uses it too much it makes her tired and weak. My theory is that Renarin is doing this unknowingly and using up his energy which may be why he apeares 'weak' or 'sickly'. What do you guys think??