Unlearned lessons will come back to haunt you.
If there are lessons that you don’t learn, you may be charged to return and attempt to complete them another time.
The unlearned lessons are more difficult to solve each time, and the result can be disastrous.
This may be why people believe they suffer from karmic debt. Always be aware of your actions and live a balanced life, if possible.
The “universal mind.”
It’s worthwhile to shift the subject for a moment to the idea of the Universal or Hive Mind. This is a concept whereby the human consciousness or humanities soul evolves over time.
It remembers previous incarnations and builds upon those memories. It’s the reason our society becomes more sophisticated during the course of the history of mankind. The human soul has learned and grown and will continue to do so.