Indeed, the only truly serious questions are ones that even a child can formulate. Only the most naive of questions are truly serious. They are the questions with no answers. A question with no answer is a barrier that cannot be breached. In other words, it is questions with no answers that set the limit of human possibilities, describe the boundaries of human existence.
Milan Kundera, The Unbearable Lightness of Being
answers, barriers, boundaries, children, existence, questions