Here are some others.
From The Fall of the Spirits of Darkness (Lecture 13, October 27, 1917):
"I have told you that the spirits of darkness are going to inspire their human hosts, in whom they will be dwelling, to find a vaccine that will drive all inclination towards spirituality out of people’s souls when they are still very young, and this will happen in a roundabout way through the living body. Today, bodies are vaccinated against one thing and another; in future, children will be vaccinated with a substance which it will certainly be possible to produce, and this will make them immune, so that they do not develop foolish inclinations connected with spiritual life—‘foolish’ here, of course, in the eyes of materialists."
From Physiology and Therapeutics (Lecture to doctors, 1924):
"What about the smallpox vaccine? This is a peculiar case. You see, if you vaccinate someone who is an anthroposophist and has been anthroposophically trained, it does no harm. It only harms those who grow up with predominantly materialistic thoughts. In this case, vaccination becomes a kind of Ahrimanic force; the person is no longer able to lift himself or herself out of certain materialistic feelings... That is the danger of vaccination."
Here, Steiner suggests that the impact of vaccines depends on one’s spiritual development, implying that a materialistic worldview amplifies negative effects.
From various lectures compiled in anthroposophical texts:
"Vaccination will not be harmful if, subsequent to vaccination, the person receives a spiritual education. If we ensure that the child’s spiritual nature is nurtured, the effects of vaccination can be mitigated."
This reflects Steiner’s belief that spiritual education could counteract any potential negative effects of vaccines on the soul or consciousness.
Manifestations of Karma (Lecture 4, May 25, 1924):
"If you vaccinate a person, you introduce something into the physical body that works in a way similar to what comes from the spiritual world as a karmic impulse. But when it is done artificially, it lacks the counterbalance of the soul’s own activity. This can bind the human being more strongly to the physical, unless there is a conscious effort to work spiritually against it."
Steiner here connects vaccination to his concept of karma, suggesting it could anchor a person to material existence unless mitigated by spiritual effort.
From The Influences of Lucifer and Ahriman (Lecture 2, November 2, 1919):
"When people are vaccinated out of fear, this fear itself becomes a force that binds them to the material world. It is not the vaccine alone, but the disposition with which it is received, that determines its effect on the human being. If one acts out of understanding and not panic, the harm is far less."
Steiner emphasizes the psychological state of the individual as a key factor in how vaccines impact the soul, beyond their physical effects.
The Book of Revelation and the Work of the Priest (Lecture 8, September 12, 1923):
"In the future, there will be vaccines that will not only affect the body but will directly influence the soul’s capacity to connect with higher worlds. These will be developed by those who see the spirit as an enemy to their aims. It will be our task to recognize this and ensure that human beings remain free in their inner life."
