To have a good life requires being in accord with the world we live within, and within the societies we are members of we can better cope with our world by telling one another our understanding of what we see and think we know. Every individual’s experience of every moment of their lives is unique, and our modern-world humanity has benefited greatly by people sharing their unique discoveries. Thus, to continue this process of human growth, it makes sense to explore into the unknown to find even better ways of living; however, when things are discovered that degrade our well-being we need methods for limiting their harm. In this view we are aiming to maximize human happiness in the present and in the future, but to achieve that improvement requires understanding the desirable and undesirable aspect of everything. However, we all know the world is complicated, and so it makes sense to encourage everyone to discover everything they can and tell the rest of us about what they have found.
The amount of accurate and true information is vast, and with little doubt there are vast amounts of true things that remain to be discovered, but there is far more false information that can be created because there is no limit to the way that words can be put together to form new ideas. To change a single word in a play like Hamlet might change the whole meaning. Instead of “To be or not to be, that is the question,” if it were “To see or not to see, that is the question,” that would change a play about suicide and homicide into one of closer inspection of reality and hoaxing. We must have accurate ways of perceiving our true reality, and then of casting out our non-workable fantastic realities.
Of course there now arises a howl from the believers in fantastic realities because their fantasies were designed to make them feel good. They would ask, why believe that our lives are limited to this world, that our bodies are going to die, that all our struggles will soon evaporate into random atoms bouncing about in a meaningless jitter, when instead we can choose to believe in an infinite life of pure happiness? The answer is that believing those fantastic things interferes with believing the real ones, and while you are believing fantasies your real life is degraded, and you degrade the lives of those around you. Living a lie is a fragile existence that shatters easily when it encounters death-dealing reality.
Freedom of speech aligns us and our society with natural reality.