Just because it is not remembered does not mean it is not important. To forget does not absolve everything. You don't even know what you have lost, but it is still lost.
Madness string 12179
And do you think, that if you do not go and do it, another you will? Another you will make it so? Well, maybe they will. But it won't be you. And you won't be certain. And you'll have to live with that.