You've always heard the saying 'you can't change the past' but the truth is, you do; every day. You decide what's important, what's memorable, what's painful... you decide what you keep and what you let go... and you look back with a different set of eyes, and a renewed perspective that gives you insight in ways you haven't seen before.
So you can look back now, at everything that brought you here, and rearrange it all. Keep some things, purge the rest... the past is simply the echoes of yesterday... and today you can sing a different song.
The past is yours, as much as the present and the future... you have the power to change all of it.