“I'm the riddle you have yet to solve”
“Communism is the riddle of history solved, and it knows itself to be this solution.”
“Neither I nor the four flippers of the sea-bear of the Boreal ocean have been able to solve the riddle of life.”
“I know all about you from your books,' she said. 'But in spite of that you're still a riddle to me.' Have you come here to solve it?' I asked.”
“He studied her lips like they were a riddle he desperately needed to solve.”
“We can't save the past or solve the riddle of love. But to me, it's worth trying.”