Related:

• Algebraists do it in groups.
• Logicians do it or they do not do it.
• Do-be-do-be-do. -- F. Sinatra
• Make it do ... Or do without.
• Do, or do not; there is no try.
• Try not. Do. Or do not. There is no try.
• To do is to be - Nietzsche To be is to do - Sartre Do be do be do - Sinatra
• To be or not to be. -- Shakespeare To do is to be.
  -- Nietzsche To be is to do. -- Sartre Do be do be do. -- Frank Sinatra...
• TO DO IS TO BE -- Socrates TO BE IS TO DO -- Sartre DO BE DO BE DO -- Sinatra