“You can't undo the past but you can certainly not repeat it.”

“Can’t repeat the past?…Why of course you can!”

“Can't repeat the past?" he cried incredulously. "Why of course you can!"
He looked around him wildly, as if the past were lurking here in the shadow of his house, just out of reach of his hand.”

“Everyone has a past, but that's just it--it's in the past. You can learn from it, but you can't change it.”

“You cannot undo your acts. If you have depraved another's will, and injured another's soul, it may be in the grace of God that hereafter you will be personally accepted, and the consequence of your guilt inwardly done away; but your penitence cannot undo the evil you have done. The forgiveness of God — the blood of Christ itself — does not undo the past.”

“You can't change the past, but you can ruin the present by worrying about the future.”

“I take responsibility only for the future, not the past. The past can't hurt you the way the future can.”

“I can’t undo the past. But in the future, I will gladly lay my life down for you, brother. (Styxx)”

“There's no way you can get the past right. You can pretend. You can delude yourself, but you can't re-create what's over.”

“You can't correct a mistake by repeating it over again.”