10 points to guess the book:
I never wanted to be a god, he thought. I wanted only to disappear like a jewel of trace dew caught by the morning. I wanted to escape the angels and the damned - alone...as though by an oversight.

 "I told him that to endure oneself might be the hardest task in the universe."
"That's...that's..."
"A bitter pill."
"Bitter nonsense!"
"The greatest palatinate earl and lowliest stipendiary serf share the same problem. You cannot hire...an intellect to solve it for you. There's no writ of inquest or calling of witnesses to provide answers. No servant - or disciple - can dress the wound. You dress it yourself or continue bleeding for all to see."

"We have eternity, beloved."
"You may have eternity. I have only now."
"But this is eternity."