Septimus, lately taken from life to death, the Lord who had come to renew society, who lay like a coverlet, a snow blanket smitten only by the sun, for ever unwasted, suffering for ever, the scapegoat, the eternal sufferer, but he did not want it, he moaned, putting from him with a wave of his hand that eternal suffering, that eternal loneliness. (1.78)
Septimus imagines himself as a lonely savior figure. He believes that he has a message to share – that his suffering can at least teach something to others. In the end, it seems he's right: his death is certainly a lesson to Clarissa.