The principal taskofcivilisation, its actual raisond'e"  tre, is to defend us against nature.

-Freud, Sigmund
  Introductory Lectures.

   Ohne Butter werden wir fertig, aber nicht beispielsweise ohne Kanonen.Wenn wir einmal u«  berfallen werden, dann k o« nnen wir uns nicht mit Butter, sondern nur mit Kanonen verteidigen. We can manage without butter but not, for example, without guns. If we are attacked, we can only defend ourselves with guns not butter.

-Goebbels, (Paul) Joseph
  Speech in Berlin,17  Jan.

   Our body is a machine for living. It is organized for that, it is its nature. Let life go on in it unhindered and let it defend itself, it will do more than if you paralyse it by encumbering it with remedies.

-Tolstoy, Leo Nikolayevich
  War and Peace, bk.10, ch.29.

I disapprove of what you say, but I will defend to the death your right to say it.

-Voltaire pseudonym of  Fran c° ois Marie Arouet
Attributed.