There are things that are so serious that you can only joke about them.Niels Bohr (1885-1962) Danish physicist
Sometimes misattributed to Werner Heisenberg. Quoted in A Pais, The Genius of Science: A Portrait Gallery (2000). Other sources give Pais' translation as ""Some subjects are so serious that one can only joke about them."
Alt trans.: "Some things are so serious that one can only joke about them."