After all, why does man start to make wrong decisions in ego? Know how the feeling of 'i' becomes the reason for the fall in the video

The greatest power of man is his conscience, and his greatest weakness is his ego. History, Scripture and current society all prove that when a person is filled with ego, it erases the line between right and wrong. His confidence gradually becomes in a blind ego and he loses decision -making ability. Result – He starts to make decisions that eventually lead him to collapse. The question arises- why does this happen?