That's not necessarily true.
The whole "nobody ever changes" Saying is false. Every second of every memory changes you, even the smallest most insignificant memories change you, even if its only a small amount, to were you don't realize how much you've changed until you look back a few years. But who has time to be looking in the past? The future is now, right? Well, yes, but the past shapes the future. Every moment matters. Sometimes its important to look back and see how much you've grown as a person.