
“We are all on earth to help others. What on earth the others are here for, I can't imagine.”
Often cited as by Auden without attribution, this quotation has been traced to John Foster Hall (1867-1945), an English comedian known as the Reverend Vivian Foster, Vicar of Mirth. Full history with sound recording http://audensociety.org/vivianfoster.html
Misattributed