> wonder if even a successful 'mission' wasn't a false sand-castle that disappears when I die. Our lives today are the accumulation of billions of sand-castles

> wonder if even a successful 'mission' wasn't a false sand-castle that disappears when I die. Our lives today are the accumulation of billions of sand-castles built by others before us. It may be very hard to discern how one's life will ripple out through time in the vast future, but many small ripples undeniably combine together into something much larger.