If there is so much friction, violence, and tension in the world, it is only because so many individual persons themselves are inwardly experiencing these things. They fill the world's aura with bad thoughts which, if sustained, prolonged, and strong enough, break out on the physical level into undesirable or evil happenings. If there is so little real peace in the world, it is only because there is so little real peace in the individuals who live in the world. Their thinking, their emotions, and their passions have affected the mental atmosphere of the world.
-- Notebooks Category 11: The Negatives > Chapter 4: In Thoughts, Feelings, Violent Passions > # 4