Optimism Pessimism 5 Philosophy 5 Good and evil 4 Hope 4 Conduct of life 3 Happiness 3 Enlightenment 2 General 2 Health 2 Literature 2 Moral and ethical aspects 2 Organizational behavior 2 Philosophy and religion 2 Philosophy, Modern 2 Psychological aspects 2 Religious aspects 2 Theodicy 2 Achievement 1 Adjustment (Psychology) 1 Adolescent psychology 1 American poetry 1 Attitude (Psychology) 1 Cheerfulness 1 Christianity 1 Cognition in adolescence 1 Communication 1 Creative thinking 1 Depression in children 1 Determination (Personality trait) 1