Help with a quote please?

Here is the cover page for my dgs's grad album.  I want to add a quote I half remember about, something about you have to remember the past to chart the future, but so far, no luck remembering.  Does anyone know the quote or the original author or where I can find this information?

grad book cover page by Gramma Dee, on Flickr

Most of the book will be copies of the scrapbook pages I have created about him throughout his life so far.