To deny the past, is to deny the future.
-Ursula LeGuin, The Farthest Shore
Those who stare at the past have their backs turned to the future.
These are two rather controversial quotes. I agree with both of them however. The first one is kind of debatable whether or not it's always true, but I definitely think it is. Your past, your years growing up, your experiences, your background- these all shape who you are. If you reject all that, then how can you look to the future, which will be determined by the above? But the second statement is also true. If you're to busy concentrating on the past, regretting it, thinking about it, then you have your back to the future. You're not planning for what's to come, all the possibilities and the open world before you. It's tricky to not deny your past, but also to not spend to much time in it.