Those who cannot remember the past are condemned to repeat it.

Ceux qui ne peuvent se souvenir du passé sont condamnés à le répéter.

Those unable to catalog the past are doomed to repeat it.

Those who don't know history are doomed to repeat it

Those who cannot remember the past, are condemned to repeat it.” — George Santayana, The Life of Reason: Five Volumes in One

Those who fail to learn from history are doomed to repeat it.

The ideas which now pass for brilliant innovations and advances are in fact mere revivals of ancient errors, and a further proof of the dictum that those who are ignorant of the past are condemned to repeat it.

Those who would repeat the past must control the teaching of history. — Bene Gesserit Coda

And while forgetting the past might condemn people to repeat it, remembering it too vividly condemned them to never leave.

History repeats itself. That's one of the things wrong with history.

Wer sich an die Vergangenheit nicht erinnert, ist dazu verdammt sie zu wiederholen.

"I hate to say this to a professor of history, and a very good one, but South Africa is a land cruelly wounded by its constant recollection of things past. At certain points the English did behave poorly; this is never allowed to be forgotten. At every memorial the same time-worn litany of incidents must be recited. Hatreds become enshrined as the most vital components of the national mythos, and no one is ever permitted to forget, or turn his attention to more creative tasks. I remember that day you told us what Santayana had said: "Those who forgot history are condemned to repeat it." Well, those who remember it obsessively are poisoned by it. p1149"

Want of foresight, unwillingness to act when action would be simple and effective, lack of clear thinking, confusion of counsel until the emergency comes, until self-preservation strikes its jarring gong - these are the features which constitute the endless repetition of history.

The past is always a rebuke to the present.