Knowledge of higher worlds by no means concerns only the individual human being, only his personal welfare and misfortune. 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.
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