Adult survival rules: Don't express opinions on matters you're not paying for. Remember that what people say when they're angry is often true. In the eyes of acquaintances, there's no room for exceptional people. What's free often comes at a price you can't afford. Some people's hearts turn dark the moment their eyes do. The essence of networking is value exchange. Don't easily help acquaintances; you might end up with enemies. Smart people don't believe in character; they believe in human nature.