This cannot be got over, simply by saying that those who assert such things are mistaken. We need not be too severe in judging those who put forth these theories. We are not attacking individual scientists here; it is quite comprehensible that they are involved in a line of thought which must lead to such errors — we must admit this in all fairness. The one, perhaps, may not be able to free himself from scientific tradition; another perhaps considers it excusable, for, having a wife and children he would be in an awkward position if he were to break away from the ruling opinions.
But the whole thing must be considered as a phenomenon of the times, for Science is beginning not only to spread abroad false theories, but to take away the life-promoting remedies, the spiritual conception of life, which is able to fortify and which is alone able to stand up against the physical, — the power which must otherwise overwhelm man. The physical can only possess overwhelming power as long as a man does not build up strength in his spiritual nature. If he does this, a warrior will grow up within him, a warrior who will defend him against the physical.
Source: Rudolf Steiner – GA 116 – The Christ Impulse and the Development of the Ego-Consciousness: LECTURE 2. THE LAW OF KARMA WITH RESPECT TO THE DETAILS OF LIFE – Berlin, 22nd December, 1909
Translated by Harry Collison