“People not only don't know what's happening to them, they don't even know that they don't know.”

Simplified Meaning:

Sometimes, people are unaware of important things going on around them, and what’s more, they don’t realize that they are missing out on this information. It’s like being in a room with a big elephant, but not noticing it at all, and also not knowing that you didn’t notice. For example, imagine you’re in a group of friends and everyone is talking about a surprise party they are planning. If you are not paying attention, you might not catch on to the hints. Worse, you might not even know that you missed the hints and end up being completely surprised or feeling left out when the party happens. This situation can happen in many areas of life, like at work or in personal relationships. If you don’t stay informed or pay attention, you might miss out on important information or changes. To apply this, you can make an effort to listen carefully, ask questions, and stay curious about what’s going on. This way, you can avoid being in the dark and stay on top of things.