I do not dwell on the past.
If I make a mistake, I take note of my error and resolve not to make the same mistake again, but I do not feel guilt or waste time wishing I had done something differently. “Should have” and “could have” are phrases that I refuse to say.
It is the same with positive events. I appreciate and enjoy things as they happen, but I do not turn back to those happier occasions in times of trouble or hardship. Living in the past has never solved any problems or accomplished anything in the world, and I am not one to waste time on practices that have no value.
Other people may treasure their possessions because of “sentimental value” or other emotional attachments. I value the things I own for their practical purposes, not because they are the focus of happy memories or were passed down from another person. Material possessions have three, and only three, purposes: they can be used as intended, sold for a profit, or discarded.
Always move forward, never back. The future is a lump of clay, waiting to be manipulated and shaped by those who reach it first. And races are never won by those who focus all their attention on the past.