"If someone says...that mathematical reasoning cannot be carried beyond a certain point, you may be sure that the really interesting problem begins precisely there."
                        --Felix Klein, Elementary Mathematics from an Advanced Standpoint

"We can forgive a man for making a useful thing as long as he does not admire it.  The only excuse for making a useless thing is that one admires it intensely."
                        --Oscar Wilde, The Picture of Dorian Gray