The wisest of humans know they are severely ignorant, which, ironically, is a very intelligent knowing as it is. Wise men and women are humbled by the immensity of the all-pervasive Universe that they cannot relate to with merely the five senses. And even what they can deduce through sight and touch and such, only gives a glimpse as to what is really going on. Native Americans called it the Great Mystery. We aren't supposed to figure it all out, the intrigue fuels our inquisitive minds as we ask ourselves- "what IS it all about?!". Einstein said something like, "when you stop learning you die". He was less ignorant than most on a lot of matters but also knew that he himself knew hardly anything, and that's what kept him wanting to know more. He knew a lot but was not a know-it-all.
Avoid know-it-allism. A know-it-all cannot be taught anything new which leaves little to no room for renovation on the house of your mind. If we choose to ignore someone or something based on a preconceived notion that we already know or even know better, then we may be ignoring our way into ignorance. If you walk right past someone or something in ignorance because you think you know better or you think you are better, you may be turning your nose up to an opportunity to learn. To learn something about life, about someone else or about yourself.
One of the Four Agreements is "Don't Make Assumptions". Assuming things about others can block us from a True Reflection. Assuming that something is going to be a certain way may set you up for disappointment. By being open we invite in an essence more closely linked to Truth. We say to the Universe- "I don't know it all already and i am willing to be enlightened". In this respect you may find yourself having a revelation within a conversation with a child or find out a girl you dismissed because you didn't like her shoes has had similar experiences as you, with great insights to share. Pay attention. Everything has something to teach in it's own unique way. Arrogance is a built-in cop-out. Curiosity is a genuine and caring way to enrich your own Book of Knowledge.
The quest for Higher Knowledge has many pathways. And Mysteries unveil themselves to the open-hearted on those roads to the Ultimate Truth. Don't be stupid. Realize your ignorance and seek out morsels of the Great Mystery.