Random Valdor quote

Hey y'all, BA player, reading The End of Death on and off for the past couple weeks/month and the fragments of quote from Valdor is haunting my mind. I can't remember most of it, but the gist was he would say [random emotion] is for humans, the custodes are not troubled by that. (99.99% imvery wring there, but thats all I can come up with). I do believe it was from Volume 1, any help is greatl appreciated :D