What is the biggest mystery in the universe?

I have realized the biggest mystery in the universe is deciphering yourself. It is not about discovering life in outer space, new scientific and technological inventions or God..... The mystery is US. It can take us a lifetime or many more to peel away layers of ego, misconceptions, negative emotions, false beliefs and desires to uncover what lies beneath. The journey is tough and most of the time human will to undertake it is weak. We live in denial and don't really want to experience the hardship and travails of solving this mystery. It is just easier to live on the surface of life than dive to the depths to uncover uncomfortable truths about ourselves. The journey generally starts when we face a difficult situation in our lives which arouses a negative emotion in us and we suffer because we resist. I have experienced that to let go, to surrender to the flow of time and situation is the best way to embark on the process of self-discovery. It is not easy to give up our need to control events in our lives according to our liking but sometimes that is the only way. And once we decide to ride the wave then we have to accept that to surf it like a pro we need to adapt, change and upgrade our surfing technique. That is, we need to acknowledge that the way we tackle and face our problems currently has to change. The thumb rule is that whatever we may feel or think the only way to progress is to do the right thing. No excuses. Each time we decide and do the right thing we become better at it and peel away a layer hiding our true self.