V. Jeshu ben Pandira I

When the geometrician, for example, grasps the relationships pertaining to the triangle, this lifts him only into the astral element. But, when he grasps the triangle as a symbol, say of the participation of the human being in the three worlds, of his threefoldness, this helps him to a higher level. One who sees in symbols the expression of the soul force, who inscribes this in his heart, who feels in connection with everything that people generally merely know, brings his thoughts into connection with Devachan. For this reason, in meditating we must feel our way through what is given us, for only thus do we bring ourselves into connection with the world of Devachan. Ordinary science, therefore, void of any feeling, can never bring the human being, no matter how keen, into connection with anything except the astral world.