“For the most part, these are not new lessons, but lessons learned in different circumstances and surroundings. The fact that they are not new is of course a lesson in itself — we must continually strive to benefit from past experiences and structure our management so that past related experience can be brought to bear on current problems.”

“Some of the best lessons we ever learn are learned from past mistakes. The error of the past is the wisdom and success of the future.”

“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.”

“We face the future fortified with the lessons we have learned from the past. It is today that we must create the world of the future.”

“The past is rich in lessons from which we would greatly profit except that the present is always so full of Special Circumstances.”

“We can draw lessons from the past, but we cannot live in it.”

“The real lessons of life are learned by recognizing and coming to terms with being human. It is how we stand up to failure and duress which really marks our progress in life. Sometimes one of the most important lessons is to learn to just let go of the past.”

“Advice can never take the place of experience. That which advice can sometimes do is to make experience more fruitful of good; to help us the better to understand the lessons of life; and when those lessons are sharp and unwelcome, to bear them with an even and unruffled mind.”

“It was never too late to learn something. The past is unalterable in any event. The future is the only thing we can change. Learning the lessons of the past is the only way to shape the present and the future.”

“The only progress I can see is progress in organization. The ordinary human being does not live long enough to draw any substantial benefit from his own experience. And no one, it seems, can benefit by the experiences of others. Being both a father and teacher, I know we can teach our children nothing. We can transmit to them neither our knowledge of life nor of mathematics. Each must learn its lesson anew.”