“We cannot be free without being free to harm ourselves. Advances in technology can remove physical dangers from our lives, but, when it does, the spiritual dangers increase. By spiritual danger I mean a danger to your integrity, your decency, your sense of life. Against those dangers I warn you: you can be invulnerable, if you choose, because no spiritual danger can conquer you without your own consent. But, once they have your consent, those dangers are all-powerful, because no outside force can come to your aid. Spiritual dangers are always faced alone.”