Do something that will last and be beautiful. It doesn't have to be a bridge-or a symphony or book or a business. It could be the look in the eye of a child you raise or a simple garden you tend. Do something that will last and be beautiful.
Write: write letters. Keep journals. Besides your children, there is no surer way of achieving immortality.
I have made all my films for my children with the exception of my first film because my oldest daughter wasn't born when I was making the film about the Brooklyn Bridge.