Let the area inside a circle represent the knowledge of the human race today. The circumference of the circle is then a representation of the questions we are trying to answer. Put another way, the circumference of the "circle of knowledge" is a measure of the ignorance of the human race. More interestingly, the area outside the circle represents the knowledge we don't know we don't have : It is the ignorance of ignorance.

With the passage of time, we learn more and the circle of knowledge grows. However, with every little bit of knowledge that we gain (or the discoveries we make) comes a whole new world of questions and puzzles that we did not even think of before. This is the beauty of knowledge. It is not linear. It is a chain reaction where an answer to one question leads to millions of other questions. That is something to rejoice - for what fun would the world be if there was nothing more left to know.

However, if increasing our knowledge, creates ever-more unanswered questions, does this mean, that we, as humans, can never reach the ultimate goal of knowing everything? I don't know the answer to that but maybe the approach that science has taken today will not lead us to our ultimate goal. Scientists have realized today that there are limits to what the human body and the senses can do. But is there a limit to what the human brain can achieve too? The brain too is after all a physical entity. Maybe the first step in reaching the goal of ultimate knowledge is realizing this.

Universe is not only queerer than we think, it is queerer than we can think. - Albert Einstien