Just a memory

Man's memories are uncertain and the past that was differs little from the past that was not.
—Cormac McCarthy, Blood Meridian

[...]Just remember that the things you put into your head are there forever, he said. You might want to think about that.
You forget some things, don't you?
Yes. You forget what you want to remember and you remember what you want to forget.
—Cormac McCarthy, The Road