Attempt to strip history down to just the facts

You change the past when you change the way you see it.
- Alan Cohen

History is a vast early warning system.
- Norman Cousins

Study the past, if you would divine the future.
- Confucius

He who spends time regretting the past,
loses the present and risks the future.
- Quevedo

Oh yes, the past can hurt.
But, you can either run from it or, learn from it.
- the movie The Lion King

Live life with no regrets and no resentments.
Whatever happened in the past,
forgive yourself and others. Choose love.
- Jonathan Lockwood Huie

Clean the Lens Through Which You View the Past.
Clear away the prejudices and the biases.
Consider history from the perspective of both the losers and the winners.
Attempt to strip history (both your personal history and world history) down to just the facts.
 - Jonathan Lockwood Huie

Further reading: Learning From History

Release the Past

The Cleansing Power of Forgiveness

Letting Go - Moving On