Sourced

• Der Mensch ist, was er isst.
• A man is what he eats.
  • Ludwig Feuerbach (1804-1872), Blätter für literarische Unterhaltung, 12th November 1850.

• Men are so imprudent that they take up a diet which, though it tastes sweet, is poisonous.
  • Niccolo Machiavelli, The Prince

Unsourced

• Nothing tastes as good as skinny feels.
  • Anonymous

• Simple diet is best.
  • Pliny

• Things sweet to taste prove in digestion sour.
  • William Shakespeare

• In general, mankind, since the improvement of cookery, eats about twice as much as nature requires.
  • Benjamin Franklin

• I'm on a whisky diet. I've lost three days already.
  • Tommy Cooper

• Eat, drink and be merry, for tomorrow ye diet.
  • Lewis C. Henry

• ITS "DIE" WITH A "T". THATS WHAT IT IS!!!!
  • Garfeild