Our words are often only vague, inadequate descriptions of our thoughts. Something gets lost in translation every time we try to express our thoughts in words. And when the other person hears our words, something gets lost in translation again, because words mean different things to different people. "A long time" may mean 10 hours to one person, but 10 days to another. So when a thought is formed in my brain, and my mouth expresses it in words, and your ears hear it, and your brain processes it, your brain and my brain never truly see exactly the same thing. Communication is always just an approximation.