The human being can deceive himself. He can yield to the belief that there is no hidden world, that what appears to his senses and his intellect contains everything that can possibly exist. But this deception is only possible, not for the deeper, but for the surface consciousness. Feeling and desire do not submit to this deceptive belief. In one way or another, they will always crave for a concealed something, and if this is withdrawn from them, they force the human being into doubt, into a feeling of insecurity of life, indeed, into despair. A cognition that reveals the hidden is capable of overcoming all hopelessness, all insecurity, all despair, in fact all that weakens life and makes it incapable of the service required of him in the cosmos.
This is the beautiful fruit of the knowledge of spiritual science that it gives strength and firmness to life, and not alone gratification to the passion for knowledge. The source from which this knowledge draws its power to work and its trust in life is inexhaustible. No one who has once really approached this source will, by repeatedly taking refuge in it, go away unstrengthened.
Source: Rudolf Steiner – GA 13 – An Outline of Occult Science: I: THE CHARACTER OF OCCULT SCIENCE
Translated by Maud and Henry B. Monges and revised for this edition by Lisa D. Monges