Related:

• I don't know. I don't care. And it doesn't make any difference.
• I know what 's what, and have always taken care of the main chance.
  -- Miguel de Cervantes (1547-1616) -- Don Quixote, Part i, Book iii, Chap. ix...
• Sing away sorrow, cast away care. -- Miguel de Cervantes (1547-1616) -- Don Quixote, Part i, Book iii, Chap.
  viii...
• No, but I can get close enough that it won't make any difference.
• And if I laugh at any mortal thing, 'T is that I may not weep.
  -- Lord Byron (1788-1824) -- Don Juan, Canto iv, Stanza 4...
• I know Jack Shit.
• Let us make hay while the sun shines. -- Miguel de Cervantes (1547-1616) -- Don Quixote, Part i, Book iii, Chap.
  xi...
• Ill-luck, you know, seldom comes alone. -- Miguel de Cervantes (1547-1616) -- Don Quixote, Part i, Book iii, Chap.
  vi...