Quote
1)Memory says, "I did that." --Friedrich Nietzsche

Memory says, "I did that.”

Pride replies, "I could not have done that.”

Eventually, memory yields.

--Friedrich Nietzsche

Paraphrase
People do many things in their life that they would not confess to others, nor to themselves.

Explanation
A lot of what a person does in a lifetime is sinful. So even though they know they have done it, they wouldn't admit it, and eventually OMIT it or lie, for their own satisfaction. By doing that, the truth (What's been done.) would soon be forgotten, since what remains would be what they've emphasized they've done, or even nothing, because they've chose to forget it.

Comment
I believe this is very true in modern society. People have come to care too much about what others think for their own self-importance and value. For example: I will do something knowing it's bad, or eventually would know it's bad, and omit it later on when things are over and clear, thinking that my pride would have not possibly let me done a thing like that in the first place. So by feeding myself propaganda (false information), I will change the truth of what had really occurred, and then be convinced that I have not done it through my own comfort. It's sad, but it's true. It's what everyone does, is doing, and would do.