Time.

A thing so precious and yet wasted much of the time. Although if it is what you wanted to do at the time, it is not time wasted. We often do things and regret them later. But we should not regret them if we learn from those incidents. Live and learn. Think about things.

The path of mistakes is often the best road to success. If we never made mistakes, we would never learn anything, and what would life be worth if we never learned?

Don't regret time, because it's never wasted if you learn from your mistakes.