The world cannot be rightly considered from the one-sided standpoint of one single conception, one single mode of thought; the world discloses itself only to someone who knows that one must look at it from all sides.
Just as the sun — if we go by the Copernican conception of the universe — passes through the signs of the Zodiac in order to illuminate the earth from twelve different points, so we must not adopt one standpoint, the standpoint of Idealism, or Sensationalism, or Phenomenalism, or any other conception of the world with a name of this kind; we must be in a position to go all round the world and accustom ourselves to the twelve different standpoints from which it can be contemplated. In terms of thought, all twelve standpoints are fully justifiable.
For a thinker who can penetrate into the nature of thought, there is not one single conception of the world, but twelve that can be equally justified — so far justified as to permit of equally good reasons being thought out for each of them. There are twelve such justified conceptions of the world.
Source: Rudolf Steiner – GA 151 – Human and Cosmic Thought – Berlin, January 21, 2014
Translation revised by Charles Davy / With an Introduction by Nick Thomas
Each of the 12 can have a different conception of the world and fully justify it
The great Rudolf Steiner Quotes Site 