« Impa knows she cannot lie. She can never lie about this.
“Beautiful,” Impa says » okay, that's not something one would lie about in the first place, so
Impa (lying): I think you look like shit
using words to create a heightened sense of emotional weight is fine but next time choose ones which make sense
try just actually saying what you fucking mean, like “the answer resonates within Impa with a clarity which cannot be mistaken, and when she responds, it is with a sincerity which cannot be faked.”
that is what you mean right. it's a strong, important feeling and she expresses it from the depths of her heart. there are words for that which are just that; you don't need the reduplicative “she cannot lie; she could never lie”; you can just say she's sincere
