Where does hope end?

"In spite of the weather contradicting his mood, Geralt silently finds himself thanking gods he doesn’t believe in. He prays to the omnipresent beings that maybe, just maybe, there is hope. Hope for a day the sun has reason to shine."

Or where Geralt refuses to leave Jaskier behind when climate change takes a drastic turn for the worst, even though they both know they're extending the unavoidable. Death.