What is the most helpful insight you've ever had?

I usually don’t like asking questions about “most” of something. So, take this one with a grain of salt. Anything you consider to be an insight will serve. I’m hoping people will tell the story of what happened to lead up to the insight, and what the insight is.

I don’t know why I’m fixating on insight today. Maybe I want to understand how the process works in other people. My sense is that insight can come from anywhere, not just considerable religious practice. It can lead to scientific discoveries, or life lessons. It can come from relationships, study, travel, games, investing, spirit journeys, shamanic rituals, or many other places and activities. So help me. Give me your insights, your poor, your huddled masses…. oops. Wrong saying.