Lecture II
All these conceptions of the world that I have described and written down for you really exist, and they can be maintained. And it is possible to bring forward the most ingenious reasons for each of them; it is possible to adopt any one of them and with ingenious reasons to refute the others. In between these conceptions of the world one can think out yet others, but they differ only in degree from the leading types I have described, and can be traced back to them. If one wishes to learn about the web and woof of the world, then one must know that the way to it is through these twelve points of entry. There is not merely one conception of the world that can be defended, or justified, but there are twelve. And one must admit that just as many good reasons can be adduced for each and all of them as for any particular one. 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.