In "The Death of Ivan Ilyich," How might Ivan Ilyich's sense of duty be impacting his health?

The excerpt from Leo Tolstoy's The Death of Ivan Ilyich, Ivan Ilyich use the Caius allusion to deal with his impending death when Ivan Ilyich regrets his wasted life and longs for the love of family and friends he has lost in the past. Ivan does not genuinely value friendship or family, for him, it is of mutual benefit. His lifestyle and the way his attitude is forming his life were incapable of facing the end of their life as the regrets are piling up because they do not understand the value of life and the meaning that it gives.