Stone Walls do not a Prison make,
Nor Iron bars a Cage,
Minds innocent and quiet take
That for an Hermitage.
If I have freedom in my love,
And in my soul am free,
Angels alone that soar above,
Enjoy such Liberty.
- Richard Lovelace.
So what we summed up is Focus on present neither on past nor on future, Past is gone and Future is yet to come. So better give your 100% to present and land your next step perfectly.
You'll be good in future.
But but but i'm not saying we should avoid remebering our own mistakes. no we shouldn't.
we should remember them always and what we have to know is to learn from em, promise ourself we'll never repeat those mistakes again.