To rectify past blunders is impossible, but we might profit by the experience of them.

All life is experience, and one level is exchanged for another only when its lesson is learned.

We should not look back unless it is to derive useful lessons from past errors, and for the purpose of profiting by dearly bought experience.

Experience is the only teacher we have. We may talk and reason all our lives, but we shall not understand a word of truth until we experience it ourselves.

In this bright future you can't forget your past.

To bring together the records of the past and to house them in buildings where they will be preserved for the use of men and women in the future, a Nation must believe in three things. It must believe in the past. It must believe in the future. It must, above all, believe in the capacity of its own people so to learn from the past that they can gain in judgment in creating their own future.