I came across a quote from Quentin Crisp, "To my disappointment I now realized that to know all is not to forgive all. It is to despise everybody. ", in a newsletter.
However, I can't figure out what it means. Does he mean if somebody claims to "know all", he's actually "despising everybody"? Or does he mean once somebody knows all, he will proceed to despise everybody instead of forgiving all?
I'm not sure if this would be more suited to this SE or the English Learner SE. Feel free to migrate it if it's not appropriate here.