7-Tier Expanding Brain

To be or not to be - Shakespear; To do is to be - Jean Paul Sartre; To be is to do - Voltaire; Do be do be do - Frank Sinatra; Scoo bee doo bee doo - Scooby Doo; Do be do be do bah (x5) - Agent P; To do, to do to do to do, to do to do to do to doooo - Pink Panther