There are two opposite errors into which those who study the annals of our country are in constant danger of falling, the error of judging the present by the past, and the error of judging the past by the present. The former is the error of minds prone to reverence whatever is old, the latter of minds readily attracted by whatever is new. The former error may perpetually be observed in the reasonings of conservative politicians on the questions of their own day. The latter error perpetually infects the speculations of writers of the liberal school when they discuss the transactions of an earlier age. The former error is the more pernicious in a statesman, and the latter in a historian.

I do not look to history to absolve my country of the need to do things right today. Rather I seek to understand the wrongs of yesterday, both to grasp what has brought us to our present reality and to understand the past for itself. The past is not necessarily a guide to the future, but it does partly help explain the present. One cannot, as I have written elsewhere, take revenge upon history; history is its own revenge.

I do not look to history to absolve my country of the need to do things right today. I seek to understand the wrongs of yesterday, both to grasp what has brought us to our present reality and to understand the past for itself.

We should not be obsessed with the present alone, we must heed the past too. Is it fair, for instance, to see only the 25 ft. tall tree and forget the seed that brought it forth? Will the tree accept it if we forget the seed of it all? Is it possible to visualise a future without the seed? We must learn to appraise ourselves of the past if we want a meaningful present. You could call this an act of gratitude or an evaluation of reality.

If we want to understand the past we must do so on its own terms, and disregard the future of that past, but if we want to understand the present we better not disregard the past steps that were essential for getting to the present. This is of importance especially for those of us engaged in trying to push ahead the scientific path of discovery today. We are not much interested in what scientists did wrong, there is too much of that. We are interested in what they did right, because we are trying to copy them in this, not in that.

If you want the present to be different from the past, study the past.

Study the past if you would define the future.

Looking at the past must only be a means of understanding more clearly what and who they are so that they can more wisely build the future.

You think your past defines you, and worse, you think that it is an unchangeable reality, when really, your perception of it changes as you do.
Because experience is always multi-dimensional, there are a variety of memories, experiences, feelings, “gists” you can choose to recall…and what you choose is indicative of your present state of mind. So many people get caught up in allowing the past to define them or haunt them simply because they have not evolved to the place of seeing how the past did not prevent them from achieving the life they want, it facilitated it. This doesn’t mean to disregard or gloss over painful or traumatic events, but simply to be able to recall them with acceptance and to be able to place them in the storyline of your personal evolution.

You have to know the past to understand the present.

I know of no way of judging of the future but by the past.

We ought not to endeavor to revise history according to our latter day notions of what things ought to have been, or upon the theory that the past is simply a reflection of the present

The past, and how we view it, is more a reflection of where we currently are than of the past itself. As the psychologist Dr. Brent Slife states in the book Time and Psychological Explanation (emphasis mine): “We reinterpret or reconstruct our memory in light of what our mental set is in the present. In this sense, it is more accurate to say the present causes the meaning of the past, than it is to say that the past causes the meaning of the present. . . . Our memories are not stored and objective entities but living parts of ourselves in the present. This is the reason our present moods and future goals so affect our memories.

Only by acceptance of the past, can you alter it