The more you know, the more you left unknown, consciously. That means that for every little thing you know, there are many you don’t, some of which you become conscious of once you start knowing the first thing. That is, knowing something means you start knowing the fact that you don’t know some other things.
For each question, an answer. For each answer, several questions. For each zone revealed in knowledge fields, many species of flora and fauna are seen; few are known, the rest are now known to be unknown. We don’t know many things; we don’t even know how many things we don’t know, but we are absolutely sure we don’t know many things. But what about knowing the unknown?