‘Not at all!’ Kirillov turned around to shake his hand. ‘If my burden is light, because such is my nature, then perhaps your burden is heavier because such is your nature.’
Stavrogin has a grave sense of nihilism. His burden is heavier than Kirillov’s possibly because he still believes in the Devil without believing in God (Stavrogin says this at Tikhon’s.) But Kirillov is a universalist (‘everything is good’) who believes in the deification of man.