V. Jeshu ben Pandira I
Our ordinary thought life reaches only up to the astral world. No matter how brilliant our thoughts may be, if they are not sustained by feelings they penetrate no further than the astral world; they have no significance for other worlds. You will certainly understand in this connection what is said in regard to external science, dry, matter-of-fact external science. No man can by means of thoughts not permeated by emotion affirm anything regarding other realms than the astral. Under ordinary circumstances, the thinking of the scientist, the chemist, the mathematician, proceeds without any accompanying feeling. It goes no further than just under the surface. Indeed, scientific research even demands that it shall proceed in this way, and because of this it penetrates only into the astral world.