Introduction

"Precisely through true occult-scientific observations man arrives at the certainty that, from a higher standpoint, the welfare and misfortune of the individual is intimately bound up with the welfare or misfortune of the whole world. The human being comes to understand that he injures the whole universe and all its beings by not developing his forces in the proper way. If he lays waste his life by losing the relationship with the supersensible, he not only destroys something in his own inner being — the decaying of which can lead him finally to despair — but because of his weakness he creates a hindrance to the evolution of the whole world in which he lives.
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 In one way or another, they will always crave for a concealed something, and if this is withdrawn from them, they force the human being into doubt, into a feeling of insecurity of life, indeed, into despair.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."

"Living beings succumb to death in order that new life may arise. It is precisely the knowledge of the supersensible that can shed clear light upon the beautiful words of Goethe: “Nature has invented death that she might have abundant life.” Just as there could be no life in the ordinary sense of the word without death, so can there be no true knowledge of the visible world without insight into the supersensible. All knowledge of what is visible must plunge again and again into the invisible in order to evolve. Thus it is evident that the science of the supersensible alone makes the life of revealed knowledge possible. It never weakens life when it appears in its true form. When, having been left to itself, life becomes weak and sickly, supersensible knowledge strengthens it and makes it, ever and again, fresh and healthy."

"Even though life has taught us this or that, the abilities we have acquired by ourselves serve the cause of spiritual training. If life has brought us excitability, we should break ourselves of the habit; if life has brought us complacency, then we should through self-education arouse ourselves to such a degree that the expression of the soul corresponds to the impression received. Anyone who never laughs about anything has just as little control of his life as someone who, without any control whatever, is continually given to laughter...
One cannot consider the bad good and the false true, but it is possible to attain the ability not to be deterred by evil from seeing good, and by error from seeing truth."

"It is entirely correct that one cannot learn through condemning faults, but only through understanding them. If, however, because of understanding, one should entirely exclude disapproval, one would not get very far either. Here also it is not a question of one-sidedness in either direction, but of equanimity and equilibrium of the soul powers."

Rudolf Steiner, Occult Science